{"id":10465,"date":"2026-05-15T20:45:56","date_gmt":"2026-05-15T11:45:56","guid":{"rendered":"https:\/\/techmania.jp\/blog\/?p=10465"},"modified":"2026-05-15T20:46:02","modified_gmt":"2026-05-15T11:46:02","slug":"c-foreach","status":"publish","type":"post","link":"https:\/\/techmania.jp\/blog\/c-foreach\/","title":{"rendered":"\u3010C#\u3011foreach\u6587\u306e\u4f7f\u3044\u65b9\uff5cList\u306e\u53cd\u5fa9\u51e6\u7406\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u53d6\u5f97\u3092\u5fb9\u5e95\u89e3\u8aac"},"content":{"rendered":"\n<p>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u3059\u308b\u4e0a\u3067\u3001\u53cd\u5fa9\u51e6\u7406 (\u30eb\u30fc\u30d7\u51e6\u7406) \u306f\u6b20\u304b\u305b\u306a\u3044\u91cd\u8981\u306a\u6a5f\u80fd\u306e\uff11\u3064\u3067\u3059\u3002<br>\u53cd\u5fa9\u51e6\u7406\u3092\u8a18\u8ff0\u3059\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u4e2d\u306e\uff11\u3064\u306b foreach\u6587\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001C#\u3067 foreach\u6587\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__1\" class=\"wp-block-heading\">C#\u306eforeach\u3068\u306f<\/h2>\n\n\n\n<p>foreach\u6587\u306f\u3001\u914d\u5217\u3084List\u306a\u3069\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3001\u8981\u7d20\u3092\u9806\u756a\u306b\u53d6\u308a\u51fa\u3057\u3066\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u7e70\u308a\u8fd4\u3057\u69cb\u6587\u3067\u3059\u3002<br>\u901a\u5e38\u306efor\u6587\u306e\u5834\u5408\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u756a\u53f7\u3092\u4f7f\u3063\u3066\u5404\u8981\u7d20\u306b\u30a2\u30af\u30bb\u30b9\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u304c\u3001foreach\u6587\u3067\u306f\u8981\u7d20\u305d\u306e\u3082\u306e\u3092\u76f4\u63a5\u53d6\u5f97\u3067\u304d\u308b\u305f\u3081\u3001\u30b3\u30fc\u30c9\u3092\u7c21\u6f54\u304b\u3064\u5b89\u5168\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u4e3b\u306b\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3066\u983b\u7e41\u306b\u4f7f\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>List<\/li>\n\n\n\n<li>\u914d\u5217<\/li>\n\n\n\n<li>Dictionary<\/li>\n\n\n\n<li>Queue<\/li>\n\n\n\n<li>HashSet<\/li>\n<\/ul>\n\n\n\n<h2 id=\"outline__2\" class=\"wp-block-heading\">list\u3092\u4f7f\u3063\u3066\u30ea\u30b9\u30c8\u306e\u4e2d\u8eab\u3092\u4e00\u3064\u305a\u3064\u53d6\u308a\u51fa\u3059\u65b9\u6cd5<\/h2>\n\n\n\n<p>foreach\u6587\u306fList\u3068\u306e\u76f8\u6027\u304c\u975e\u5e38\u306b\u826f\u304f\u3001\u5b9f\u52d9\u3067\u3082\u591a\u7528\u3055\u308c\u3066\u3044\u307e\u3059\u3002<br>\u5177\u4f53\u7684\u306a\u4f7f\u7528\u65b9\u6cd5\u306b\u3064\u3044\u3066\u898b\u3066\u3044\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n\n\n\n<h3 id=\"outline__2_1\" class=\"wp-block-heading\">\u57fa\u672c\u306e\u66f8\u304d\u65b9\u3068var\u3092\u4f7f\u3063\u305f\u4fbf\u5229\u306a\u65b9\u6cd5<\/h3>\n\n\n\n<p>foreach\u306e\u57fa\u672c\u69cb\u6587\u306f\u4ee5\u4e0b\u306e\u901a\u308a\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>foreach (\u578b\u540d \u5909\u6570\u540d in \u30b3\u30ec\u30af\u30b7\u30e7\u30f3)\n{\n    \u51e6\u7406\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">foreach<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #FFCB6B\">\u578b\u540d<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">\u5909\u6570\u540d<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF; font-style: italic\">in<\/span><span style=\"color: #EEFFFF\"> \u30b3\u30ec\u30af\u30b7\u30e7\u30f3<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    \u51e6\u7406<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u6307\u5b9a\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5404\u8981\u7d20\u304c\u5909\u6570\u306b\u683c\u7d0d\u3055\u308c\u3001\u30d6\u30ed\u30c3\u30af\u5185\u3067\u4f7f\u7528\u3059\u308b\u3053\u3068\u304c\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>List&lt;string> fruits = new List&lt;string>()\n{\n    \"\u308a\u3093\u3054\",\n    \"\u307f\u304b\u3093\",\n    \"\u3076\u3069\u3046\"\n};\n\nforeach (string fruit in fruits)\n{\n    Console.WriteLine(fruit);\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #FFCB6B\">List<\/span><span style=\"color: #89DDFF\">&lt;<\/span><span style=\"color: #89DDFF\">string<\/span><span style=\"color: #89DDFF\">&gt;<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">fruits<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">new<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">List<\/span><span style=\"color: #89DDFF\">&lt;<\/span><span style=\"color: #89DDFF\">string<\/span><span style=\"color: #89DDFF\">&gt;()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #C3E88D\">\u308a\u3093\u3054<\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #89DDFF\">,<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #C3E88D\">\u307f\u304b\u3093<\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #89DDFF\">,<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #C3E88D\">\u3076\u3069\u3046<\/span><span style=\"color: #89DDFF\">&quot;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">};<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">foreach<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">string<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">fruit<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF; font-style: italic\">in<\/span><span style=\"color: #EEFFFF\"> fruits<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    Console<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">WriteLine<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #EEFFFF\">fruit<\/span><span style=\"color: #89DDFF\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">\u5b9f\u884c\u7d50\u679c<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>\u308a\u3093\u3054\n\u307f\u304b\u3093\n\u3076\u3069\u3046<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #EEFFFF\">\u308a\u3093\u3054<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">\u307f\u304b\u3093<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">\u3076\u3069\u3046<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u306e\u3088\u3046\u306b\u3001List\u306e\u8981\u7d20\u30921\u3064\u305a\u3064\u9806\u756a\u306b\u53d6\u5f97\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<p>\u307e\u305f\u3001\u578b\u63a8\u8ad6\u306e var \u3092\u4f7f\u3046\u3053\u3068\u3067\u3001\u3088\u308a\u7c21\u6f54\u306b\u8a18\u8ff0\u3067\u304d\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>foreach (var fruit in fruits)\n{\n    Console.WriteLine(fruit);\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">foreach<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #FFCB6B\">var<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">fruit<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF; font-style: italic\">in<\/span><span style=\"color: #EEFFFF\"> fruits<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    Console<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">WriteLine<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #EEFFFF\">fruit<\/span><span style=\"color: #89DDFF\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>var\u306f\u30b3\u30f3\u30d1\u30a4\u30e9\u304c\u578b\u3092\u81ea\u52d5\u3067\u5224\u5b9a\u3057\u3066\u304f\u308c\u308b\u305f\u3081\u3001\u8907\u96d1\u306a\u578b\u3092\u6271\u3046\u969b\u306a\u3069\u306b\u4fbf\u5229\u3067\u3059\u3002<br>\u305f\u3060\u3057\u3001\u30b3\u30fc\u30c9\u3060\u3051\u3067\u306f\u578b\u304c\u5206\u304b\u308a\u3065\u3089\u304f\u306a\u308b\u30b1\u30fc\u30b9\u3082\u3042\u308b\u305f\u3081\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u305f\u4f7f\u3044\u5206\u3051\u304c\u91cd\u8981\u3068\u306a\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"outline__2_2\" class=\"wp-block-heading\">\u30eb\u30fc\u30d7\u4e2d\u306b\u4e2d\u8eab\u3092\u66f8\u304d\u63db\u3048\u3089\u308c\u306a\u3044\u554f\u984c\u3068\u89e3\u6c7a\u7b56<\/h3>\n\n\n\n<p>foreach\u6587\u3092\u4f7f\u7528\u3059\u308b\u969b\u306e\u6ce8\u610f\u70b9\u3068\u3057\u3066\u3001\u30eb\u30fc\u30d7\u51e6\u7406\u4e2d\u306b\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u5185\u5bb9\u3092\u5909\u66f4\u3059\u308b\u3068\u3001\u4f8b\u5916\u304c\u767a\u751f\u3059\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>List&lt;int> numbers = new List&lt;int>()\n{\n    1, 2, 3\n};\n\nforeach (var number in numbers)\n{\n    numbers.Add(100);\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #FFCB6B\">List<\/span><span style=\"color: #89DDFF\">&lt;int&gt;<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">numbers<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">new<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">List<\/span><span style=\"color: #89DDFF\">&lt;int&gt;()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">3<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">};<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">foreach<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #FFCB6B\">var<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">number<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF; font-style: italic\">in<\/span><span style=\"color: #EEFFFF\"> numbers<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    numbers<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">Add<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #F78C6C\">100<\/span><span style=\"color: #89DDFF\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">\u5b9f\u884c\u7d50\u679c<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>System.InvalidOperationException: Collection was modified; enumeration operation may not execute.<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #EEFFFF\">System.InvalidOperationException: Collection was modified; enumeration operation may not execute.<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u3053\u308c\u306f\u3001\u51e6\u7406\u4e2d\u306b\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306e\u69cb\u9020\u304c\u5909\u5316\u3059\u308b\u3053\u3068\u306b\u3088\u308a\u3001\u6574\u5408\u6027\u304c\u5d29\u308c\u3066\u767a\u751f\u3059\u308b\u30a8\u30e9\u30fc\u3067\u3059\u3002<br>\u4e3b\u306a\u89e3\u6c7a\u7b56\u3068\u3057\u3066\u306f\u3001\u4ee5\u4e0b\u306e\uff12\u70b9\u304c\u6319\u3052\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>for\u6587\u3092\u4f7f\u7528\u3059\u308b<\/li>\n\n\n\n<li>\u30b3\u30d4\u30fc\u3092\u4f5c\u6210\u3059\u308b<\/li>\n<\/ul>\n\n\n\n<p>\u53ef\u8aad\u6027\u304c\u3088\u308a\u9ad8\u3044\u306e\u306f\u5f8c\u8005\u306e\u65b9\u3067\u3059\u304c\u3001\u30c7\u30fc\u30bf\u91cf\u304c\u591a\u3044\u5834\u5408\u306b\u30b3\u30b9\u30c8\u304c\u304b\u304b\u3063\u3066\u3057\u307e\u3046\u305f\u3081\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u4f7f\u3044\u5206\u3051\u308b\u306e\u304c\u30d9\u30b9\u30c8\u3067\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__3\" class=\"wp-block-heading\">index\u3092\u4f7f\u3063\u3066\u30eb\u30fc\u30d7\u5185\u3067\u6dfb\u3048\u5b57\u3092\u53d6\u5f97\u3059\u308b\u65b9\u6cd5<\/h2>\n\n\n\n<p>C#\u3067\u306f\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u53d6\u5f97\u3059\u308b\u6a5f\u80fd\u304cforeach\u6587\u306b\u306f\u3042\u308a\u307e\u305b\u3093\u3002<br>\u305d\u306e\u305f\u3081\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u64cd\u4f5c\u304c\u5fc5\u8981\u306a\u30b1\u30fc\u30b9\u306b\u304a\u3044\u3066\u306f\u3001for\u6587\u3092\u4f7f\u7528\u3059\u308b\u306e\u304c\u4e00\u822c\u7684\u3067\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>List&lt;string> fruits = new List&lt;string>()\n{\n    \"\u308a\u3093\u3054\",\n    \"\u307f\u304b\u3093\",\n    \"\u3076\u3069\u3046\"\n};\n\nfor (int i = 0; i &lt; fruits.Count; i++)\n{\n    Console.WriteLine($\"{i} : {fruits&#91;i&#93;}\");\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #FFCB6B\">List<\/span><span style=\"color: #89DDFF\">&lt;<\/span><span style=\"color: #89DDFF\">string<\/span><span style=\"color: #89DDFF\">&gt;<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">fruits<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">new<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">List<\/span><span style=\"color: #89DDFF\">&lt;<\/span><span style=\"color: #89DDFF\">string<\/span><span style=\"color: #89DDFF\">&gt;()<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #C3E88D\">\u308a\u3093\u3054<\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #89DDFF\">,<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #C3E88D\">\u307f\u304b\u3093<\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #89DDFF\">,<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #89DDFF\">&quot;<\/span><span style=\"color: #C3E88D\">\u3076\u3069\u3046<\/span><span style=\"color: #89DDFF\">&quot;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">};<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">for<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(int<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">i<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">;<\/span><span style=\"color: #EEFFFF\"> i <\/span><span style=\"color: #89DDFF\">&lt;<\/span><span style=\"color: #EEFFFF\"> fruits<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #EEFFFF\">Count<\/span><span style=\"color: #89DDFF\">;<\/span><span style=\"color: #EEFFFF\"> i<\/span><span style=\"color: #89DDFF\">++)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    Console<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">WriteLine<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">$&quot;{<\/span><span style=\"color: #EEFFFF\">i<\/span><span style=\"color: #89DDFF\">}<\/span><span style=\"color: #C3E88D\"> : <\/span><span style=\"color: #89DDFF\">{<\/span><span style=\"color: #EEFFFF\">fruits<\/span><span style=\"color: #89DDFF\">&#91;<\/span><span style=\"color: #EEFFFF\">i<\/span><span style=\"color: #89DDFF\">&#93;}&quot;<\/span><span style=\"color: #89DDFF\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">\u5b9f\u884c\u7d50\u679c<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>0 : \u308a\u3093\u3054\n1 : \u307f\u304b\u3093\n2 : \u3076\u3069\u3046<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #EEFFFF\">0 : \u308a\u3093\u3054<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">1 : \u307f\u304b\u3093<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">2 : \u3076\u3069\u3046<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<h3 id=\"outline__3_1\" class=\"wp-block-heading\">LINQ\u306eSelect\u30e1\u30bd\u30c3\u30c9\u3092\u7528\u3044\u3066\u30b9\u30de\u30fc\u30c8\u306b\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u53d6\u5f97\u3059\u308b<\/h3>\n\n\n\n<p>LINQ \u306e Select() \u3092\u5229\u7528\u3059\u308b\u3068\u3001foreach\u6587\u3092\u7dad\u6301\u3057\u305f\u307e\u307e\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u6271\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>foreach (var item in fruits.Select(\n    (value, index) => new { value, index }))\n{\n    Console.WriteLine($\"{item.index} : {item.value}\");\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">foreach<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #FFCB6B\">var<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">item<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF; font-style: italic\">in<\/span><span style=\"color: #EEFFFF\"> fruits<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">Select<\/span><span style=\"color: #89DDFF\">(<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #FFCB6B\">value<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">index<\/span><span style=\"color: #89DDFF\">)<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=&gt;<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">new<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">{<\/span><span style=\"color: #EEFFFF\"> value<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #EEFFFF\"> index <\/span><span style=\"color: #89DDFF\">}))<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    Console<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">WriteLine<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">$&quot;{<\/span><span style=\"color: #EEFFFF\">item<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #EEFFFF\">index<\/span><span style=\"color: #89DDFF\">}<\/span><span style=\"color: #C3E88D\"> : <\/span><span style=\"color: #89DDFF\">{<\/span><span style=\"color: #EEFFFF\">item<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #EEFFFF\">value<\/span><span style=\"color: #89DDFF\">}&quot;<\/span><span style=\"color: #89DDFF\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>foreach\u6587\u306e\u53ef\u8aad\u6027\u306e\u9ad8\u3055\u3092\u4fdd\u3061\u3064\u3064\u3001\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u3092\u53d6\u5f97\u3067\u304d\u308b\u306e\u304c\u30e1\u30ea\u30c3\u30c8\u3067\u3059\u3002<br>\u305f\u3060\u3057\u3001LINQ\u306f\u5185\u90e8\u7684\u306b\u30aa\u30d6\u30b8\u30a7\u30af\u30c8\u751f\u6210\u3092\u4f34\u3046\u305f\u3081\u3001\u4f7f\u7528\u3059\u308b\u5834\u5408\u306f\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3078\u306e\u5f71\u97ff\u3082\u8003\u616e\u3059\u308b\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<h3 id=\"outline__3_2\" class=\"wp-block-heading\">\u5916\u90e8\u30ab\u30a6\u30f3\u30bf\u5909\u6570\u3092\u7528\u3044\u305f\u5f93\u6765\u624b\u6cd5\u3068\u306e\u4f7f\u3044\u5206\u3051\u3068\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u5f93\u6765\u3067\u306f\u3001\u5916\u90e8\u5909\u6570\u3067\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u7ba1\u7406\u3059\u308b\u65b9\u6cd5\u3082\u3088\u304f\u4f7f\u308f\u308c\u3066\u3044\u307e\u3057\u305f\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>int index = 0;\n\nforeach (var fruit in fruits)\n{\n    Console.WriteLine($\"{index} : {fruit}\");\n    index++;\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #89DDFF\">int<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">index<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">0<\/span><span style=\"color: #89DDFF\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">foreach<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #FFCB6B\">var<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">fruit<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF; font-style: italic\">in<\/span><span style=\"color: #EEFFFF\"> fruits<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    Console<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">WriteLine<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #89DDFF\">$&quot;{<\/span><span style=\"color: #EEFFFF\">index<\/span><span style=\"color: #89DDFF\">}<\/span><span style=\"color: #C3E88D\"> : <\/span><span style=\"color: #89DDFF\">{<\/span><span style=\"color: #EEFFFF\">fruit<\/span><span style=\"color: #89DDFF\">}&quot;<\/span><span style=\"color: #89DDFF\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    index<\/span><span style=\"color: #89DDFF\">++;<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>\u30b7\u30f3\u30d7\u30eb\u306a\u65b9\u6cd5\u3067\u3059\u304c\u3001\u4f7f\u7528\u6642\u306b\u306f\u4ee5\u4e0b\u306e\u30c7\u30e1\u30ea\u30c3\u30c8\u304c\u4f34\u3046\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>index\u66f4\u65b0\u5fd8\u308c<\/li>\n\n\n\n<li>\u53ef\u8aad\u6027\u4f4e\u4e0b<\/li>\n\n\n\n<li>\u30cd\u30b9\u30c8\u6642\u306e\u7ba1\u7406\u8907\u96d1\u5316<\/li>\n<\/ul>\n\n\n\n<h2 id=\"outline__4\" class=\"wp-block-heading\">\u53cd\u5fa9\u51e6\u7406\u306e\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u3092\u6700\u9069\u5316\u3057\u3001\u52b9\u7387\u3092\u5411\u4e0a\u3055\u305b\u308b\u30b3\u30c4<\/h2>\n\n\n\n<p>\u901a\u5e38\u306e\u30a2\u30d7\u30ea\u30b1\u30fc\u30b7\u30e7\u30f3\u3067\u306f\u3001foreach\u6587\u306e\u6027\u80fd\u304c\u554f\u984c\u306b\u306a\u308b\u30b1\u30fc\u30b9\u306f\u5c11\u306a\u3044\u3067\u3059\u304c\u3001\u5927\u91cf\u30c7\u30fc\u30bf\u3092\u6271\u3046\u969b\u306b\u306f\u5dee\u304c\u51fa\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<br>\u305d\u306e\u305f\u3081\u3001\u72b6\u6cc1\u306b\u5fdc\u3058\u3066\u30d1\u30d5\u30a9\u30fc\u30de\u30f3\u30b9\u306e\u6700\u9069\u5316\u3092\u884c\u3046\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h3 id=\"outline__4_1\" class=\"wp-block-heading\">Span\u3084ReadOnlySpan\u306b\u3088\u308b\u30e1\u30e2\u30ea\u52b9\u7387\u306e\u6539\u5584<\/h3>\n\n\n\n<p>Span \u306f\u3001\u30e1\u30e2\u30ea\u30b3\u30d4\u30fc\u3092\u907f\u3051\u306a\u304c\u3089\u30c7\u30fc\u30bf\u3092\u6271\u3048\u308b\u9ad8\u901f\u6a5f\u80fd\u3067\u3059\u3002<br>\u7279\u306b\u3001\u4ee5\u4e0b\u306e\u51e6\u7406\u306a\u3069\u306b\u5bfe\u3057\u3066\u52b9\u679c\u3092\u767a\u63ee\u3057\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u5927\u91cf\u6587\u5b57\u5217\u51e6\u7406<\/li>\n\n\n\n<li>\u30d0\u30a4\u30ca\u30ea\u89e3\u6790<\/li>\n\n\n\n<li>\u9ad8\u901f\u30eb\u30fc\u30d7<\/li>\n<\/ul>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>int[] numbers = { 1, 2, 3, 4 };\n\nSpan&lt;int> span = numbers;\n\nforeach (var number in span)\n{\n    Console.WriteLine(number);\n}<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #89DDFF\">int[]<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">numbers<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">{<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">1<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">2<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">3<\/span><span style=\"color: #89DDFF\">,<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #F78C6C\">4<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">};<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #FFCB6B\">Span<\/span><span style=\"color: #89DDFF\">&lt;int&gt;<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">span<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> numbers<\/span><span style=\"color: #89DDFF\">;<\/span><\/span>\n<span class=\"line\"><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF; font-style: italic\">foreach<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #FFCB6B\">var<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">number<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF; font-style: italic\">in<\/span><span style=\"color: #EEFFFF\"> span<\/span><span style=\"color: #89DDFF\">)<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">{<\/span><\/span>\n<span class=\"line\"><span style=\"color: #EEFFFF\">    Console<\/span><span style=\"color: #89DDFF\">.<\/span><span style=\"color: #82AAFF\">WriteLine<\/span><span style=\"color: #89DDFF\">(<\/span><span style=\"color: #EEFFFF\">number<\/span><span style=\"color: #89DDFF\">);<\/span><\/span>\n<span class=\"line\"><span style=\"color: #89DDFF\">}<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<p>ReadOnlySpan \u3092\u4f7f\u3046\u3068\u3001\u8aad\u307f\u53d6\u308a\u5c02\u7528\u3068\u3057\u3066\u6271\u3048\u307e\u3059\u3002<\/p>\n\n\n\n<div class=\"wp-block-kevinbatdorf-code-block-pro\" data-code-block-pro-font-family=\"Code-Pro-JetBrains-Mono-NL.ttf\" style=\"font-size:clamp(14px, .875rem, 21px);font-family:Code-Pro-JetBrains-Mono-NL,ui-monospace,SFMono-Regular,Menlo,Monaco,Consolas,monospace;line-height:clamp(20px, 1.25rem, 30px);--cbp-tab-width:2;tab-size:var(--cbp-tab-width, 2)\"><span style=\"display:flex;align-items:center;padding:10px 0px 10px 16px;margin-bottom:-2px;width:100%;text-align:left;background-color:#304047;color:#d5ffff\">C#<\/span><span role=\"button\" tabindex=\"0\" style=\"color:#EEFFFF;display:none\" aria-label=\"Copy\" class=\"code-block-pro-copy-button\"><pre class=\"code-block-pro-copy-button-pre\" aria-hidden=\"true\"><textarea class=\"code-block-pro-copy-button-textarea\" tabindex=\"-1\" aria-hidden=\"true\" readonly>ReadOnlySpan&lt;int> span = numbers;<\/textarea><\/pre><svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" style=\"width:24px;height:24px\" fill=\"none\" viewBox=\"0 0 24 24\" stroke=\"currentColor\" stroke-width=\"2\"><path class=\"with-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M4.5 12.75l6 6 9-13.5\"><\/path><path class=\"without-check\" stroke-linecap=\"round\" stroke-linejoin=\"round\" d=\"M16.5 8.25V6a2.25 2.25 0 00-2.25-2.25H6A2.25 2.25 0 003.75 6v8.25A2.25 2.25 0 006 16.5h2.25m8.25-8.25H18a2.25 2.25 0 012.25 2.25V18A2.25 2.25 0 0118 20.25h-7.5A2.25 2.25 0 018.25 18v-1.5m8.25-8.25h-6a2.25 2.25 0 00-2.25 2.25v6\"><\/path><\/svg><\/span><pre class=\"shiki material-theme\" style=\"background-color: #263238\" tabindex=\"0\"><code><span class=\"line\"><span style=\"color: #FFCB6B\">ReadOnlySpan<\/span><span style=\"color: #89DDFF\">&lt;int&gt;<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #FFCB6B\">span<\/span><span style=\"color: #EEFFFF\"> <\/span><span style=\"color: #89DDFF\">=<\/span><span style=\"color: #EEFFFF\"> numbers<\/span><span style=\"color: #89DDFF\">;<\/span><\/span><\/code><\/pre><\/div>\n\n\n\n<h3 id=\"outline__4_2\" class=\"wp-block-heading\">\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u306e\u8d70\u67fb\u306b\u304a\u3051\u308b\u5217\u6319\u901f\u5ea6\u306e\u6ce8\u610f\u70b9<\/h3>\n\n\n\n<p>\u5927\u898f\u6a21\u306a\u30c7\u30fc\u30bf\u3092\u6271\u3046\u5834\u5408\u306f\u3001\u5217\u6319\u65b9\u6cd5\u306b\u3088\u308b\u6027\u80fd\u5dee\u304c\u5927\u304d\u304f\u5f71\u97ff\u3059\u308b\u30b1\u30fc\u30b9\u304c\u3042\u308a\u307e\u3059\u3002<br>\u4f8b\u3048\u3070\u3001\u4ee5\u4e0b\u306e\u3088\u3046\u306a\u51e6\u7406\u65b9\u6cd5\u306f\u3001\u901f\u5ea6\u4f4e\u4e0b\u306e\u539f\u56e0\u306b\u306a\u308a\u5f97\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>LINQ\u30c1\u30a7\u30fc\u30f3\u306e\u591a\u7528<\/li>\n\n\n\n<li>\u4e0d\u8981\u306aToList()<\/li>\n\n\n\n<li>foreach\u4e2d\u306e\u5927\u91cfGC\u767a\u751f<\/li>\n<\/ul>\n\n\n\n<p>\u5927\u91cf\u30c7\u30fc\u30bf\u306b\u5bfe\u3057\u3066\u306f\u3001for\u6587\u30fbSpan\u30fb\u914d\u5217\u76f4\u63a5\u64cd\u4f5c\u306a\u3069\u306e\u65b9\u304c\u3001\u9ad8\u901f\u306b\u51e6\u7406\u3067\u304d\u308b\u5834\u5408\u304c\u3042\u308a\u307e\u3059\u3002<br>\u305f\u3060\u3057\u3001\u53ef\u8aad\u6027\u3068\u306e\u30d0\u30e9\u30f3\u30b9\u3082\u91cd\u8981\u306a\u305f\u3081\u3001\u5b9f\u52d9\u3067\u306f\u4ee5\u4e0b\u306e\u3088\u3046\u306b\u4f7f\u3044\u5206\u3051\u308b\u30b1\u30fc\u30b9\u304c\u591a\u304f\u898b\u3089\u308c\u307e\u3059\u3002<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>\u901a\u5e38\u51e6\u7406 \u2192 foreach\u6587 \/ LINQ<\/li>\n\n\n\n<li>\u9ad8\u8ca0\u8377\u51e6\u7406 \u2192 for\u6587 \/ Span<\/li>\n<\/ul>\n\n\n\n<h2 id=\"outline__5\" class=\"wp-block-heading\">\u307e\u3068\u3081<\/h2>\n\n\n\n<p>foreach\u6587\u306f\u3001List\u3084\u914d\u5217\u306a\u3069\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u3092\u7c21\u6f54\u306b\u53cd\u5fa9\u51e6\u7406\u3067\u304d\u308b\u4fbf\u5229\u306a\u69cb\u6587\u3067\u3059\u3002<br>\u305f\u3060\u3057\u3001\u30b3\u30fc\u30c9\u306e\u53ef\u8aad\u6027\u5411\u4e0a\u3084\u5b89\u5168\u306a\u5217\u6319\u51e6\u7406\u3068\u3044\u3063\u305f\u30e1\u30ea\u30c3\u30c8\u304c\u3042\u308b\u4e00\u65b9\u3067\u3001\u30eb\u30fc\u30d7\u4e2d\u306e\u8981\u7d20\u6570\u306e\u5909\u66f4\u4e0d\u53ef\u3084\u30a4\u30f3\u30c7\u30c3\u30af\u30b9\u306e\u53d6\u5f97\u304c\u4e0d\u5f97\u624b\u306a\u70b9\u306a\u3069\u306e\u6ce8\u610f\u70b9\u3082\u5b58\u5728\u3059\u308b\u305f\u3081\u3001\u7528\u9014\u306b\u5fdc\u3058\u3066 for\u6587\u306a\u3069\u3068\u4f7f\u3044\u5206\u3051\u308b\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002<\/p>\n\n\n\n<h2 id=\"outline__6\" class=\"wp-block-heading\">C#\u306e\u52c9\u5f37\u65b9\u6cd5\u306f\uff1f<\/h2>\n\n\n<p>\u66f8\u7c4d\u3084\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u3067\u5b66\u7fd2\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002\u6628\u4eca\u3067\u306f\u3001YouTube\u306a\u3069\u306e\u52d5\u753b\u30b5\u30a4\u30c8\u3084\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u30b3\u30df\u30e5\u30cb\u30c6\u30a3\u30b5\u30a4\u30c8\u306a\u3069\u3082\u5145\u5b9f\u3057\u3066\u3044\u3066\u591a\u304f\u306e\u60c5\u5831\u304c\u624b\u306b\u5165\u308a\u307e\u3059\u3002<br \/>\u305d\u3057\u3066\u3001\u3088\u308a\u52b9\u7387\u7684\u306b\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3059\u308b\u306b\u306f\u3001\u77e5\u8b58\u3092\u3064\u3051\u306a\u304c\u3089\u5b9f\u969b\u306b\u624b\u3092\u52d5\u304b\u3057\u3066\u307f\u308b\u306a\u3069\u3001\u30a4\u30f3\u30d7\u30c3\u30c8\u3068\u30a2\u30a6\u30c8\u30d7\u30c3\u30c8\u3092\u7e70\u308a\u8fd4\u3057\u3066\u3044\u304f\u3053\u3068\u304c\u91cd\u8981\u3067\u3059\u3002\u7279\u306b\u72ec\u5b66\u306e\u5834\u5408\u306f\u3001\u6709\u8b58\u8005\u306b\u8cea\u554f\u304c\u3067\u304d\u305f\u308a\u30d5\u30a3\u30fc\u30c9\u30d0\u30c3\u30af\u3092\u3082\u3089\u3048\u308b\u3088\u3046\u306a\u74b0\u5883\u304c\u3042\u308b\u3068\u3001\u7406\u89e3\u5ea6\u304c\u6df1\u307e\u308b\u3067\u3057\u3087\u3046\u3002<\/p>\n<p>\u305f\u3060\u3001C#\u306b\u9650\u3089\u305a\u3001IT\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u308b\u969b\u3001\u3069\u3046\u3057\u3066\u3082\u8ab2\u984c\u306b\u3076\u3064\u304b\u3063\u3066\u3057\u307e\u3046\u3053\u3068\u306f\u3042\u308a\u307e\u3059\u3088\u306d\u3002\u7279\u306b\u72ec\u5b66\u3060\u3068\u3001\u308f\u304b\u3089\u306a\u3044\u90e8\u5206\u3092\u30d7\u30ed\u306b\u8cea\u554f\u3067\u304d\u308b\u6a5f\u4f1a\u3092\u78ba\u4fdd\u3057\u306b\u304f\u304f\u3001\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u304c\u7d9a\u304d\u306b\u304f\u3044\u3068\u3044\u3046\u5074\u9762\u304c\u3042\u308a\u307e\u3059\u3002\u72ec\u5b66\u3067\u30e2\u30c1\u30d9\u30fc\u30b7\u30e7\u30f3\u3092\u7dad\u6301\u3059\u308b\u81ea\u4fe1\u304c\u306a\u3044\u4eba\u306b\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3068\u3044\u3046\u624b\u3082\u3042\u308a\u307e\u3059\u3002\u8cbb\u7528\u306f\u639b\u304b\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u5206\u30b9\u30ad\u30eb\u3092\u8eab\u306b\u3064\u3051\u3084\u3059\u3044\u3067\u3059\u3002\u3057\u3063\u304b\u308a\u3068\u77e5\u8b58\u30fb\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3057\u3066\u5b9f\u8df5\u306b\u6d3b\u304b\u3057\u305f\u3044\u3068\u3044\u3046\u4eba\u306f\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u304c\u304a\u3059\u3059\u3081\u3067\u3059\u3002<\/p>\n<p><span class=\"markerYellow\"><strong>\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u306a\u3089\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u304c\u304a\u3059\u3059\u3081\uff01<\/strong><\/span><\/p>\n\n\n<img decoding=\"async\" src=\"https:\/\/web-img.rensa.jp.net\/rensa\/images\/techmania\/thumbnail\/images\/yuudou.png\" class=\"post-img\" loading=\"lazy\">\n\n\n<p>IT\u30b9\u30ad\u30eb\u9700\u8981\u306e\u9ad8\u307e\u308a\u3068\u3068\u3082\u306b\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3082\u5897\u3048\u307e\u3057\u305f\u3002\u3057\u304b\u3057\u3001\u3069\u306e\u30b9\u30af\u30fc\u30eb\u306b\u901a\u3046\u3079\u304d\u304b\u8ff7\u3063\u3066\u3057\u307e\u3046\u4eba\u3082\u3044\u308b\u3067\u3057\u3087\u3046\u3002\u305d\u3093\u306a\u65b9\u306b\u306f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3092\u304a\u3059\u3059\u3081\u3057\u307e\u3059\uff01\u3053\u308c\u307e\u3067\u591a\u304f\u306eIT\u30a8\u30f3\u30b8\u30cb\u30a2\u3092\u80b2\u6210\u30fb\u8f29\u51fa\u3057\u3066\u304d\u305f\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u3067\u3082\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u30b9\u30af\u30fc\u30eb\u3092\u958b\u8b1b\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div class=\"bgBox\">\n<p><strong>\uff1c\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u306e\u7279\u5fb4\uff1e<\/strong><br \/><strong>\u30fb\u305f\u3057\u304b\u306a\u80b2\u6210\u5b9f\u7e3e\u3068\u89aa\u8eab\u306a\u6559\u80b2\u3000\uff5e\u30bb\u30ab\u30f3\u30c9\u30ad\u30e3\u30ea\u30a2\u3092\u5168\u529b\u652f\u63f4\uff5e<\/strong><br \/><strong>\u30fb\u8b1b\u5e2b\u304c\u73fe\u5f79\u30a8\u30f3\u30b8\u30cb\u30a2\u3000\uff5e\u201c\u672c\u5f53\u201d\u306e\u958b\u767a\u30ce\u30a6\u30cf\u30a6\u3092\u76f4\u306b\u5b66\u3079\u308b\uff5e<\/strong><br \/><strong>\u30fb\u5c02\u5c5e\u8b1b\u5e2b\u304c\u5b66\u7fd2\u3092\u5fb9\u5e95\u30b5\u30dd\u30fc\u30c8\u3000\uff5e\u300c\u308f\u304b\u3089\u306a\u3044\u300d\u3092\u5fb9\u5e95\u89e3\u6c7a\uff5e<\/strong><br \/><strong>\u30fb\u5b9f\u52d9\u30d9\u30fc\u30b9\u3067\u30b9\u30ad\u30eb\u3092\u7fd2\u5f97\u3000\uff5e\u5b9f\u8df5\u7684\u306a\u51dd\u7e2e\u30ab\u30ea\u30ad\u30e5\u30e9\u30e0\uff5e<\/strong><\/p>\n<\/div>\n<p>\u3053\u306e\u3088\u3046\u306a\u7279\u5fb4\u3092\u6301\u3064\u30c6\u30c3\u30af\u30de\u30cb\u30a2\u306fIT\u30a8\u30f3\u30b8\u30cb\u30a2\u306e\u30b9\u30bf\u30fc\u30c8\u30e9\u30a4\u30f3\u3068\u3057\u3066\u6700\u9069\u3067\u3059\u3002<br \/>\u8a71\u3092\u805e\u304d\u305f\u3044\u30fb\u8a73\u3057\u304f\u77e5\u308a\u305f\u3044\u3068\u3044\u3046\u65b9\u306f<a href=\"https:\/\/techmania.jp\/lp\/2\" target=\"_blank\" rel=\"noopener\">\u3053\u3061\u3089<\/a>\u304b\u3089\u304a\u6c17\u8efd\u306b\u304a\u554f\u3044\u5408\u308f\u305b\u304f\u3060\u3055\u3044\u3002<\/p>","protected":false},"excerpt":{"rendered":"\u30d7\u30ed\u30b0\u30e9\u30df\u30f3\u30b0\u3092\u3059\u308b\u4e0a\u3067\u3001\u53cd\u5fa9\u51e6\u7406 (\u30eb\u30fc\u30d7\u51e6\u7406) \u306f\u6b20\u304b\u305b\u306a\u3044\u91cd\u8981\u306a\u6a5f\u80fd\u306e\uff11\u3064\u3067\u3059\u3002\u53cd\u5fa9\u51e6\u7406\u3092\u8a18\u8ff0\u3059\u308b\u65b9\u6cd5\u306f\u3044\u304f\u3064\u304b\u3042\u308a\u307e\u3059\u304c\u3001\u305d\u306e\u4e2d\u306e\uff11\u3064\u306b foreach\u6587\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u304c\u3042\u308a\u307e\u3059\u3002 \u4eca\u56de\u306e\u8a18\u4e8b\u3067\u306f\u3001C#\u3067 foreach\u6587\u3092\u4f7f\u7528\u3059\u308b\u65b9\u6cd5\u306b\u3064\u3044\u3066\u89e3\u8aac\u3057\u3066\u3044\u304d\u307e\u3059\u3002 C#\u306eforeach\u3068\u306f foreach\u6587\u306f\u3001\u914d\u5217\u3084List\u306a\u3069\u306e\u30b3\u30ec\u30af\u30b7\u30e7\u30f3\u306b\u5bfe\u3057\u3001\u8981\u7d20\u3092\u9806\u756a\u306b\u53d6\u308a\u51fa\u3057\u3066\u51e6\u7406\u3059\u308b\u305f\u3081\u306e\u7e70\u308a\u8fd4 [&hellip;]","protected":false},"author":12,"featured_media":10467,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"om_disable_all_campaigns":false,"_monsterinsights_skip_tracking":false,"_monsterinsights_sitenote_active":false,"_monsterinsights_sitenote_note":"","_monsterinsights_sitenote_category":0,"fifu_image_url":"https:\/\/web-img.rensa.jp.net\/images\/techmania\/thumbnail\/images\/C__foreach.webp","fifu_image_alt":"","footnotes":""},"categories":[15],"tags":[],"class_list":["post-10465","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-programming"],"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts\/10465","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/users\/12"}],"replies":[{"embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/comments?post=10465"}],"version-history":[{"count":1,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts\/10465\/revisions"}],"predecessor-version":[{"id":10466,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/posts\/10465\/revisions\/10466"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/media\/10467"}],"wp:attachment":[{"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/media?parent=10465"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/categories?post=10465"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/techmania.jp\/blog\/wp-json\/wp\/v2\/tags?post=10465"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}