{"id":4936,"date":"2026-10-27T07:20:08","date_gmt":"2026-10-27T07:20:08","guid":{"rendered":"https:\/\/skilllog.jp\/blog\/?p=4936"},"modified":"2026-10-27T07:42:09","modified_gmt":"2026-10-27T07:42:09","slug":"dotnet-8-9-end-of-support","status":"publish","type":"post","link":"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/","title":{"rendered":".NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306f2026\u5e7411\u670810\u65e5\uff5c.NET 9\u3082\u540c\u65e5\u3001\u78ba\u8a8d\u65b9\u6cd5\u3068\u79fb\u884c\u624b\u9806"},"content":{"rendered":"\n<figure class=\"wp-block-image aligncenter size-large\"><img loading=\"lazy\" decoding=\"async\" width=\"1024\" height=\"769\" src=\"https:\/\/skilllog.jp\/blog\/wp-content\/uploads\/2026\/10\/NET-8\u30fb9-\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3068.NET-10\u79fb\u884c\u6848\u5185-1024x769.webp\" alt=\".NET 8\u30fb9\u30fb10\u306e\u30b5\u30dd\u30fc\u30c8\u671f\u9650\u3092\u6bd4\u8f03\u3057\u305f\u56f3\u89e3\u3002.NET 8\u3068.NET 9\u306f2026\u5e7411\u670810\u65e5\u306b\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3057\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u304c\u505c\u6b62\u3059\u308b\u3053\u3068\u3084\u30012028\u5e7411\u670814\u65e5\u307e\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b.NET 10\u3078\u306e\u79fb\u884c\u3092\u89e3\u8aac\u3002\" class=\"wp-image-4944\" srcset=\"https:\/\/skilllog.jp\/blog\/wp-content\/uploads\/2026\/10\/NET-8\u30fb9-\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3068.NET-10\u79fb\u884c\u6848\u5185-1024x769.webp 1024w, https:\/\/skilllog.jp\/blog\/wp-content\/uploads\/2026\/10\/NET-8\u30fb9-\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3068.NET-10\u79fb\u884c\u6848\u5185-300x225.webp 300w, https:\/\/skilllog.jp\/blog\/wp-content\/uploads\/2026\/10\/NET-8\u30fb9-\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3068.NET-10\u79fb\u884c\u6848\u5185-767x576.webp 767w, https:\/\/skilllog.jp\/blog\/wp-content\/uploads\/2026\/10\/NET-8\u30fb9-\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3068.NET-10\u79fb\u884c\u6848\u5185.webp 1447w\" sizes=\"auto, (max-width: 1024px) 100vw, 1024px\" \/><\/figure>\n\n\n<div class=\"article-fv-summary\" style=\"margin:20px 0 24px;padding:22px 24px;background:#eff6ff;border:1px solid #bfdbfe;border-left:5px solid #2563eb;border-radius:12px;\">\n<p style=\"margin:0 0 10px;font-size:13px;font-weight:700;letter-spacing:.08em;color:#2563eb;\">\u3053\u306e\u8a18\u4e8b\u306e\u7d50\u8ad6<\/p>\n<p style=\"margin:0;font-size:17px;line-height:1.8;color:#1e3a5f;font-weight:700;\">.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306f2026\u5e7411\u670810\u65e5\u3067\u3059\u3002.NET 9\u3082\u540c\u3058\u65e5\u306b\u7d42\u308f\u308a\u3001\u4ee5\u964d\u306f\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u304c\u51fa\u307e\u305b\u3093\u3002\u79fb\u884c\u5148\u306f.NET 10\u3067\u3059\u3002<\/p>\n<ul style=\"margin:16px 0 0;padding-left:22px;font-size:15px;line-height:1.9;color:#334155;\">\n<li>.NET 8\u3068.NET 9\u306f\u3001\u3069\u3061\u3089\u30822026\u5e7411\u670810\u65e5\u306b\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86<\/li>\n<li>\u30a2\u30d7\u30ea\u306f\u52d5\u304d\u7d9a\u3051\u308b\u304c\u3001\u8106\u5f31\u6027\u304c\u898b\u3064\u304b\u3063\u3066\u3082\u4fee\u6b63\u306f\u51fa\u306a\u3044<\/li>\n<li>\u79fb\u884c\u5148\u306f2028\u5e7411\u6708\u307e\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b.NET 10\uff08LTS\uff09<\/li>\n<\/ul>\n<\/div>\n<p style=\"font-size:13px;color:#6b7280;margin-bottom:8px;\">\ud83d\udcd6 \u8aad\u4e86\u6642\u9593\uff1a\u7d0412\u5206<\/p>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306f2026\u5e7411\u670810\u65e5\uff08\u7c73\u56fd\u6642\u9593\uff09\u3067\u3059\u3002Microsoft\u306f\u3001\u540c\u3058\u65e5\u306b.NET 9\u306e\u30b5\u30dd\u30fc\u30c8\u3082\u7d42\u4e86\u3059\u308b\u3068\u767a\u8868\u3057\u3066\u304a\u308a\u3001\u305d\u308c\u4ee5\u964d\u306f2\u3064\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306b\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u3084\u6280\u8853\u30b5\u30dd\u30fc\u30c8\u3092\u63d0\u4f9b\u3057\u307e\u305b\u3093\u3002<\/p>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u308f\u3063\u3066\u3082\u3001\u30a2\u30d7\u30ea\u304c\u6025\u306b\u52d5\u304b\u306a\u304f\u306a\u308b\u308f\u3051\u3067\u306f\u3042\u308a\u307e\u305b\u3093\u3002\u305f\u3060\u3001\u7d42\u4e86\u5f8c\u306b\u8106\u5f31\u6027\u304c\u898b\u3064\u304b\u3063\u3066\u3082\u4fee\u6b63\u306f\u51fa\u306a\u3044\u305f\u3081\u3001\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u516c\u958b\u3057\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u307b\u3069\u5371\u967a\u304c\u5927\u304d\u304f\u306a\u308a\u307e\u3059\u3002Microsoft\u306f\u30012028\u5e7411\u6708\u307e\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b.NET 10\u3078\u306e\u79fb\u884c\u3092\u52e7\u3081\u3066\u3044\u307e\u3059\u3002<\/p>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u4ee5\u4e0b\u3067\u306f\u3001\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306e\u6982\u8981\u3001\u5bfe\u8c61\u304b\u3069\u3046\u304b\u306e\u78ba\u304b\u3081\u65b9\u3001.NET Framework\u3068\u306e\u9055\u3044\u3001.NET 10\u3078\u306e\u79fb\u884c\u624b\u9806\u3001\u9593\u306b\u5408\u308f\u306a\u3044\u3068\u304d\u306e\u8003\u3048\u65b9\u306e\u9806\u306b\u89e3\u8aac\u3057\u307e\u3059\u3002\u5185\u5bb9\u306f2026\u5e7410\u670827\u65e5\u6642\u70b9\u306eMicrosoft\u306e\u516c\u958b\u60c5\u5831\u306b\u3082\u3068\u3065\u3044\u3066\u3044\u307e\u3059\u3002<\/p>\n<div style=\"margin-top:32px;margin-bottom:24px;padding:24px;background-color:#fef3f2;border-left:4px solid #ef4444;border-radius:8px;\">\n<p style=\"font-size:16px;line-height:1.6;color:#333;\"><strong>\u3053\u3093\u306a\u60a9\u307f\u306f\u3042\u308a\u307e\u305b\u3093\u304b<\/strong><\/p>\n<ul style=\"font-size:16px;line-height:1.6;color:#333;margin-top:12px;padding-left:24px;\">\n<li>.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u3067\u3001\u4f55\u304c\u8d77\u304d\u308b\u306e\u304b\u77e5\u308a\u305f\u3044<\/li>\n<li>\u62c5\u5f53\u3057\u3066\u3044\u308b\u30b5\u30fc\u30d0\u30fc\u3084\u30a2\u30d7\u30ea\u304c\u5bfe\u8c61\u304b\u78ba\u304b\u3081\u305f\u3044<\/li>\n<li>.NET Framework\u3082\u95a2\u4fc2\u3042\u308b\u306e\u304b\u5206\u304b\u3089\u306a\u3044<\/li>\n<li>.NET 10\u3078\u306e\u79fb\u884c\u3067\u4f55\u3092\u3059\u308c\u3070\u3088\u3044\u304b\u77e5\u308a\u305f\u3044<\/li>\n<\/ul>\n<\/div>\n<div style=\"margin-top:32px;margin-bottom:24px;padding:24px;background-color:#f9fafb;border-left:4px solid #06c755;border-radius:8px;\">\n<p style=\"font-size:16px;line-height:1.6;color:#333;\"><strong>\u3053\u306e\u8a18\u4e8b\u3067\u5206\u304b\u308b\u3053\u3068<\/strong><\/p>\n<ul style=\"font-size:16px;line-height:1.6;color:#333;margin-top:12px;padding-left:24px;\">\n<li>\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306e\u65e5\u4ed8\u3068\u3001\u7d42\u4e86\u5f8c\u306b\u8d77\u304d\u308b\u3053\u3068<\/li>\n<li>dotnet\u30b3\u30de\u30f3\u30c9\u3067\u5bfe\u8c61\u3092\u78ba\u304b\u3081\u308b\u65b9\u6cd5<\/li>\n<li>\u81ea\u5df1\u5b8c\u7d50\u578b\u3084\u30b3\u30f3\u30c6\u30ca\u3067\u306e\u6ce8\u610f\u70b9<\/li>\n<li>.NET Framework\u3068\u306e\u9055\u3044<\/li>\n<li>.NET 10\u3078\u306e\u79fb\u884c\u624b\u9806<\/li>\n<\/ul>\n<\/div>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u3053\u306e\u8a18\u4e8b\u3092\u8aad\u3081\u3070\u3001\u62c5\u5f53\u3057\u3066\u3044\u308b\u30b7\u30b9\u30c6\u30e0\u304c\u5bfe\u8c61\u304b\u3092\u5224\u65ad\u3057\u3001\u79fb\u884c\u306e\u6e96\u5099\u3092\u59cb\u3081\u3089\u308c\u307e\u3059\u3002\u307e\u305a\u306f\u7121\u6599\u3067\u30b9\u30ad\u30eb\u30ed\u30b0\u306b\u767b\u9332\u3057\u3001\u6271\u3063\u3066\u3044\u308b\u8a00\u8a9e\u3084\u30d5\u30ec\u30fc\u30e0\u30ef\u30fc\u30af\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u6574\u7406\u3057\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<div style=\"clear:both;display:flex;justify-content:center;align-items:center;gap:12px;flex-wrap:wrap;margin:32px 0;padding:8px 0;line-height:1.6;\"><a href=\"https:\/\/skilllog.jp\/users\/sign_up?utm_source=blog&utm_medium=article&utm_campaign=dotnet-8-9-end-of-support\" style=\"background:#2563eb;color:#ffffff;padding:14px 28px;border-radius:8px;text-decoration:none;font-weight:700;text-align:center;white-space:nowrap;display:inline-block;line-height:1.4;\">\u6271\u3046\u6280\u8853\u3092\u6574\u7406\u3059\u308b<\/a><a href=\"#skilllog-consultation\" style=\"background:#06c755;color:#ffffff;padding:14px 28px;border-radius:8px;text-decoration:none;font-weight:700;text-align:center;white-space:nowrap;display:inline-block;line-height:1.4;\">\u8ee2\u8077\u30fb\u6848\u4ef6\u76f8\u8ac7\u3092\u3059\u308b<\/a><\/div>\n<div style=\"margin-top:48px;margin-bottom:24px;\">\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_89 ez-toc-wrap-center counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">\u76ee\u6b21<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span 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href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E3%82%A2%E3%83%97%E3%83%AA%E3%81%8C%E3%81%A9%E3%81%AE%E3%83%90%E3%83%BC%E3%82%B8%E3%83%A7%E3%83%B3%E3%82%92%E4%BD%BF%E3%81%A3%E3%81%A6%E3%81%84%E3%82%8B%E3%81%8B\" >\u30a2\u30d7\u30ea\u304c\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u3044\u308b\u304b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E8%87%AA%E5%B7%B1%E5%AE%8C%E7%B5%90%E5%9E%8B%E3%81%AE%E3%82%A2%E3%83%97%E3%83%AA%E3%81%AF%E5%85%A5%E3%82%8C%E7%9B%B4%E3%81%97%E3%81%8C%E5%BF%85%E8%A6%81\" >\u81ea\u5df1\u5b8c\u7d50\u578b\u306e\u30a2\u30d7\u30ea\u306f\u5165\u308c\u76f4\u3057\u304c\u5fc5\u8981<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E3%82%B3%E3%83%B3%E3%83%86%E3%83%8A%E3%81%A8%E5%A4%96%E9%83%A8%E3%81%AE%E8%A3%BD%E5%93%81%E3%82%82%E5%BF%98%E3%82%8C%E3%81%9A%E3%81%AB\" >\u30b3\u30f3\u30c6\u30ca\u3068\u5916\u90e8\u306e\u88fd\u54c1\u3082\u5fd8\u308c\u305a\u306b<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#NET_Framework%E3%81%AF%E5%88%A5%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E3%81%AE%E4%BB%95%E7%B5%84%E3%81%BF\" >.NET Framework\u306f\u5225\u306e\u30b5\u30dd\u30fc\u30c8\u306e\u4ed5\u7d44\u307f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#NET_Framework_462%E3%82%82%E6%9C%9F%E9%99%90%E3%81%8C%E8%BF%91%E3%81%84\" >.NET Framework 4.6.2\u3082\u671f\u9650\u304c\u8fd1\u3044<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#NET_10%E3%81%B8%E3%81%AE%E7%A7%BB%E8%A1%8C%E6%89%8B%E9%A0%86\" >.NET 10\u3078\u306e\u79fb\u884c\u624b\u9806<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E7%A7%BB%E8%A1%8C%E3%82%92%E5%8A%A9%E3%81%91%E3%82%8B%E8%B3%87%E6%96%99\" >\u79fb\u884c\u3092\u52a9\u3051\u308b\u8cc7\u6599<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#NET_8%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E7%B5%82%E4%BA%86%E3%81%AB%E7%A7%BB%E8%A1%8C%E3%81%8C%E9%96%93%E3%81%AB%E5%90%88%E3%82%8F%E3%81%AA%E3%81%84%E3%81%A8%E3%81%8D\" >.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306b\u79fb\u884c\u304c\u9593\u306b\u5408\u308f\u306a\u3044\u3068\u304d<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E7%A7%BB%E8%A1%8C%E3%81%AE%E7%B5%8C%E9%A8%93%E3%81%AF%E7%B5%8C%E6%AD%B4%E3%81%AE%E5%BC%B7%E3%81%BF%E3%81%AB%E3%81%AA%E3%82%8B\" >\u79fb\u884c\u306e\u7d4c\u9a13\u306f\u7d4c\u6b74\u306e\u5f37\u307f\u306b\u306a\u308b<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E7%A7%BB%E8%A1%8C%E3%81%AE%E7%B5%8C%E9%A8%93%E3%82%92%E3%82%B9%E3%82%AD%E3%83%AB%E3%83%AD%E3%82%B0%E3%81%A7%E6%AE%8B%E3%81%99%E7%90%86%E7%94%B1\" >\u79fb\u884c\u306e\u7d4c\u9a13\u3092\u30b9\u30ad\u30eb\u30ed\u30b0\u3067\u6b8b\u3059\u7406\u7531<\/a><\/li><\/ul><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E3%81%BE%E3%81%A8%E3%82%81\" >\u307e\u3068\u3081<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E3%82%88%E3%81%8F%E3%81%82%E3%82%8B%E8%B3%AA%E5%95%8F\" >\u3088\u304f\u3042\u308b\u8cea\u554f<\/a><ul class='ez-toc-list-level-3' ><li class='ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#NET_8%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E3%81%AF%E3%81%84%E3%81%A4%E3%81%BE%E3%81%A7%E3%81%A7%E3%81%99%E3%81%8B%EF%BC%9F\" >.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u306f\u3044\u3064\u307e\u3067\u3067\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E3%81%8C%E7%B5%82%E3%82%8F%E3%82%8B%E3%81%A8%E3%82%A2%E3%83%97%E3%83%AA%E3%81%AF%E5%8B%95%E3%81%8B%E3%81%AA%E3%81%8F%E3%81%AA%E3%82%8A%E3%81%BE%E3%81%99%E3%81%8B%EF%BC%9F\" >\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u308f\u308b\u3068\u30a2\u30d7\u30ea\u306f\u52d5\u304b\u306a\u304f\u306a\u308a\u307e\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#NET_Framework_48%E3%82%82%E4%BB%8A%E5%9B%9E%E3%81%AE%E5%AF%BE%E8%B1%A1%E3%81%A7%E3%81%99%E3%81%8B%EF%BC%9F\" >.NET Framework 4.8\u3082\u4eca\u56de\u306e\u5bfe\u8c61\u3067\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#NET_9%E3%81%8B%E3%82%89NET_10%E3%81%B8%E3%81%AE%E7%A7%BB%E8%A1%8C%E3%81%AF%E5%A4%A7%E5%A4%89%E3%81%A7%E3%81%99%E3%81%8B%EF%BC%9F\" >.NET 9\u304b\u3089.NET 10\u3078\u306e\u79fb\u884c\u306f\u5927\u5909\u3067\u3059\u304b\uff1f<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-3'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/27\/dotnet-8-9-end-of-support\/#%E7%A7%BB%E8%A1%8C%E5%85%88%E3%81%AFNET_10%E3%81%A7%E3%82%88%E3%81%84%E3%81%A7%E3%81%99%E3%81%8B%EF%BC%9F\" >\u79fb\u884c\u5148\u306f.NET 10\u3067\u3088\u3044\u3067\u3059\u304b\uff1f<\/a><\/li><\/ul><\/li><\/ul><\/nav><\/div>\n<h2 style=\"font-size:32px;font-weight:700;border-left:6px solid #2563eb;padding-left:16px;line-height:1.5;\"><span class=\"ez-toc-section\" id=\"NET_8%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E7%B5%82%E4%BA%86%E3%81%AE%E6%A6%82%E8%A6%81\"><\/span>.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306e\u6982\u8981<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div style=\"background:#eff6ff;border-left:4px solid #2563eb;padding:16px 20px;border-radius:6px;margin-bottom:24px;\">\n<p style=\"margin:0;font-size:15px;line-height:1.7;color:#1e3a5f;\">.NET 8\u3068.NET 9\u306f\u3001\u3069\u3061\u3089\u30822026\u5e7411\u670810\u65e5\u306b\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u308f\u308a\u307e\u3059\u3002<\/p>\n<\/div>\n<table style=\"width:100%;border-collapse:collapse;margin:24px 0;\">\n<tr>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u30d0\u30fc\u30b8\u30e7\u30f3<\/th>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u7a2e\u985e<\/th>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u30ea\u30ea\u30fc\u30b9<\/th>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">.NET 8<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">LTS\uff08\u9577\u671f\u30b5\u30dd\u30fc\u30c8\u300136\u304b\u6708\uff09<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">2023\u5e7411\u670814\u65e5<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">2026\u5e7411\u670810\u65e5<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">.NET 9<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">STS\uff08\u6a19\u6e96\u671f\u9593\u30b5\u30dd\u30fc\u30c8\u300124\u304b\u6708\uff09<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">2024\u5e7411\u670812\u65e5<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">2026\u5e7411\u670810\u65e5<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">.NET 10<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">LTS\uff08\u9577\u671f\u30b5\u30dd\u30fc\u30c8\uff09<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">2025\u5e7411\u670811\u65e5<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">2028\u5e7411\u670814\u65e5<\/td>\n<\/tr>\n<\/table>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u65e5\u4ed8\u306f\u3001Microsoft\u306e\u300c.NET and .NET Core Support Policy\u300d\u306b\u3088\u308b\u3082\u306e\u3067\u3059\uff082026\u5e7410\u670827\u65e5\u6642\u70b9\uff09\u3002LTS\u3068\u306f\u3001\u9577\u671f\u9593\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b\u30ea\u30ea\u30fc\u30b9\u306e\u3053\u3068\u3067\u3001\u5076\u6570\u306e\u7248\u304cLTS\u3001\u5947\u6570\u306e\u7248\u304cSTS\u306b\u306a\u3063\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"NET_9%E3%81%8CNET_8%E3%81%A8%E5%90%8C%E3%81%98%E6%97%A5%E3%81%AB%E7%B5%82%E3%82%8F%E3%82%8B%E7%90%86%E7%94%B1\"><\/span>.NET 9\u304c.NET 8\u3068\u540c\u3058\u65e5\u306b\u7d42\u308f\u308b\u7406\u7531<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">Microsoft\u306fSTS\u306e\u30b5\u30dd\u30fc\u30c8\u671f\u9593\u309218\u304b\u6708\u304b\u308924\u304b\u6708\u306b\u5ef6\u3070\u3057\u3001\u3053\u306e\u5909\u66f4\u3092.NET 9\u304b\u3089\u9069\u7528\u3057\u307e\u3057\u305f\u3002\u305d\u306e\u7d50\u679c\u300136\u304b\u6708\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b.NET 8\u3068\u300124\u304b\u6708\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b.NET 9\u306e\u7d42\u4e86\u65e5\u304c\u3001\u540c\u30582026\u5e7411\u670810\u65e5\u306b\u305d\u308d\u3044\u307e\u3057\u305f\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E7%B5%82%E4%BA%86%E5%BE%8C%E3%81%AB%E8%B5%B7%E3%81%8D%E3%82%8B%E3%81%93%E3%81%A8\"><\/span>\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u5f8c\u306b\u8d77\u304d\u308b\u3053\u3068<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<ul style=\"margin:0 0 20px 0;padding-left:24px;line-height:1.9;\">\n<li>.NET 8\u3084.NET 9\u3067\u4f5c\u3063\u305f\u30a2\u30d7\u30ea\u306f\u3001\u305d\u306e\u307e\u307e\u52d5\u304d\u7d9a\u3051\u308b<\/li>\n<li>\u65b0\u3057\u3044\u8106\u5f31\u6027\u304c\u898b\u3064\u304b\u3063\u3066\u3082\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u306f\u51fa\u306a\u3044<\/li>\n<li>Microsoft\u306e\u6280\u8853\u30b5\u30dd\u30fc\u30c8\u3092\u53d7\u3051\u3089\u308c\u306a\u304f\u306a\u308b<\/li>\n<li>Visual Studio 2022\u3067\u306f\u3001\u4eca\u5f8c\u306e\u66f4\u65b0\u3067.NET 8\u30fb9\u306e\u90e8\u54c1\u304c\u300c\u30b5\u30dd\u30fc\u30c8\u5bfe\u8c61\u5916\u300d\u3068\u8868\u793a\u3055\u308c\u308b\u4e88\u5b9a<\/li>\n<\/ul>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">11\u670810\u65e5\u306fMicrosoft\u306e\u6708\u4f8b\u306e\u66f4\u65b0\u65e5\u306b\u5f53\u305f\u308a\u307e\u3059\u3002Microsoft\u306e.NET\u30d6\u30ed\u30b0\u306b\u3088\u308b\u3068\u3001\u91cd\u5927\u306a\u554f\u984c\u304c\u5206\u304b\u3063\u3066\u3044\u308b\u5834\u5408\u306b\u9650\u308a\u3001\u3053\u306e\u65e5\u306b\u6700\u5f8c\u306e\u66f4\u65b0\u304c\u51fa\u308b\u53ef\u80fd\u6027\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<div style=\"margin-top:48px;margin-bottom:24px;\">\n<h2 style=\"font-size:32px;font-weight:700;border-left:6px solid #2563eb;padding-left:16px;line-height:1.5;\"><span class=\"ez-toc-section\" id=\"NET_8%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E7%B5%82%E4%BA%86%E3%81%AE%E5%AF%BE%E8%B1%A1%E3%81%8B%E7%A2%BA%E3%81%8B%E3%82%81%E3%82%8B%E6%96%B9%E6%B3%95\"><\/span>.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306e\u5bfe\u8c61\u304b\u78ba\u304b\u3081\u308b\u65b9\u6cd5<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div style=\"background:#eff6ff;border-left:4px solid #2563eb;padding:16px 20px;border-radius:6px;margin-bottom:24px;\">\n<p style=\"margin:0;font-size:15px;line-height:1.7;color:#1e3a5f;\">\u30b5\u30fc\u30d0\u30fc\u306b\u5165\u3063\u3066\u3044\u308b\u30e9\u30f3\u30bf\u30a4\u30e0\u3068\u3001\u30a2\u30d7\u30ea\u304c\u4f7f\u3046\u30d0\u30fc\u30b8\u30e7\u30f3\u306e2\u3064\u3092\u78ba\u304b\u3081\u307e\u3059\u3002<\/p>\n<\/div>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30b5\u30fc\u30d0\u30fc\u3084\u958b\u767a\u7528\u306e\u30d1\u30bd\u30b3\u30f3\u306b\u30ed\u30b0\u30a4\u30f3\u3067\u304d\u308b\u5834\u5408\u306f\u3001<code>dotnet --list-runtimes<\/code> \u3067\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308b\u30e9\u30f3\u30bf\u30a4\u30e0\u3092\u3001<code>dotnet --list-sdks<\/code> \u3067\u958b\u767a\u7528\u306eSDK\u3092\u4e00\u89a7\u306b\u3067\u304d\u307e\u3059\u3002<code>dotnet --info<\/code> \u3067\u306f\u3001\u4e21\u65b9\u3068OS\u306e\u60c5\u5831\u3092\u307e\u3068\u3081\u3066\u8868\u793a\u3067\u304d\u307e\u3059\u3002<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:24px 0;\">\n<tr>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u8868\u793a\u3055\u308c\u308b\u540d\u524d<\/th>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u610f\u5473<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">Microsoft.NETCore.App 8.0.x<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">.NET 8\u306e\u57fa\u672c\u306e\u30e9\u30f3\u30bf\u30a4\u30e0<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">Microsoft.AspNetCore.App 8.0.x<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">Web\u30a2\u30d7\u30ea\uff08ASP.NET Core\uff09\u7528\u306e\u30e9\u30f3\u30bf\u30a4\u30e0<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">Microsoft.WindowsDesktop.App 8.0.x<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">Windows\u306e\u30c7\u30b9\u30af\u30c8\u30c3\u30d7\u30a2\u30d7\u30ea\u7528\u306e\u30e9\u30f3\u30bf\u30a4\u30e0<\/td>\n<\/tr>\n<\/table>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30b3\u30de\u30f3\u30c9\u304c\u4f7f\u3048\u306a\u3044\u5834\u5408\u306f\u3001Windows\u306a\u3089 <code>C:\\Program Files\\dotnet\\shared<\/code> \u306e\u4e0b\u306b\u3042\u308b\u30d5\u30a9\u30eb\u30c0\u306e\u540d\u524d\u3067\u3082\u78ba\u304b\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%A2%E3%83%97%E3%83%AA%E3%81%8C%E3%81%A9%E3%81%AE%E3%83%90%E3%83%BC%E3%82%B8%E3%83%A7%E3%83%B3%E3%82%92%E4%BD%BF%E3%81%A3%E3%81%A6%E3%81%84%E3%82%8B%E3%81%8B\"><\/span>\u30a2\u30d7\u30ea\u304c\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3092\u4f7f\u3063\u3066\u3044\u308b\u304b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9\u304c\u3042\u308b\u5834\u5408\u306f\u3001\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u30d5\u30a1\u30a4\u30eb\uff08.csproj\uff09\u306e <code>TargetFramework<\/code> \u3092\u898b\u307e\u3059\u3002<code>net8.0<\/code> \u3084 <code>net9.0<\/code> \u3068\u66f8\u304b\u308c\u3066\u3044\u308c\u3070\u5bfe\u8c61\u3067\u3059\u3002\u914d\u7f6e\u6e08\u307f\u306e\u30a2\u30d7\u30ea\u3067\u306f\u3001\u51fa\u529b\u3055\u308c\u305f\u30d5\u30a9\u30eb\u30c0\u306e <code>*.runtimeconfig.json<\/code> \u306b\u3001\u4f7f\u3046\u30e9\u30f3\u30bf\u30a4\u30e0\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304c\u66f8\u304b\u308c\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E8%87%AA%E5%B7%B1%E5%AE%8C%E7%B5%90%E5%9E%8B%E3%81%AE%E3%82%A2%E3%83%97%E3%83%AA%E3%81%AF%E5%85%A5%E3%82%8C%E7%9B%B4%E3%81%97%E3%81%8C%E5%BF%85%E8%A6%81\"><\/span>\u81ea\u5df1\u5b8c\u7d50\u578b\u306e\u30a2\u30d7\u30ea\u306f\u5165\u308c\u76f4\u3057\u304c\u5fc5\u8981<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30e9\u30f3\u30bf\u30a4\u30e0\u3092\u30a2\u30d7\u30ea\u306b\u540c\u68b1\u3059\u308b\u300c\u81ea\u5df1\u5b8c\u7d50\u578b\u300d\u3067\u914d\u7f6e\u3057\u3066\u3044\u308b\u5834\u5408\u3001\u30b5\u30fc\u30d0\u30fc\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u3092\u66f4\u65b0\u3057\u3066\u3082\u30a2\u30d7\u30ea\u306e\u4e2d\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u306f\u53e4\u3044\u307e\u307e\u3067\u3059\u3002.NET 10\u306b\u79fb\u884c\u3057\u305f\u3046\u3048\u3067\u3001\u30a2\u30d7\u30ea\u3092\u4f5c\u308a\u76f4\u3057\u3066\u914d\u7f6e\u3057\u76f4\u3059\u5fc5\u8981\u304c\u3042\u308a\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E3%82%B3%E3%83%B3%E3%83%86%E3%83%8A%E3%81%A8%E5%A4%96%E9%83%A8%E3%81%AE%E8%A3%BD%E5%93%81%E3%82%82%E5%BF%98%E3%82%8C%E3%81%9A%E3%81%AB\"><\/span>\u30b3\u30f3\u30c6\u30ca\u3068\u5916\u90e8\u306e\u88fd\u54c1\u3082\u5fd8\u308c\u305a\u306b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30b3\u30f3\u30c6\u30ca\u3067\u52d5\u304b\u3057\u3066\u3044\u308b\u5834\u5408\u306f\u3001<code>mcr.microsoft.com\/dotnet\/aspnet:8.0<\/code> \u306e\u3088\u3046\u306b\u3001\u4f7f\u3063\u3066\u3044\u308b\u30a4\u30e1\u30fc\u30b8\u306e\u30bf\u30b0\u3092\u78ba\u304b\u3081\u307e\u3059\u3002\u793e\u5916\u306e\u88fd\u54c1\u304c.NET 8\u3084.NET 9\u3067\u4f5c\u3089\u308c\u3066\u3044\u308b\u5834\u5408\u306f\u3001Microsoft\u306e\u6848\u5185\u3069\u304a\u308a\u3001.NET 10\u306b\u5bfe\u5fdc\u3057\u305f\u7248\u3092\u63d0\u4f9b\u5143\u306b\u78ba\u304b\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u5bfe\u8c61\u306e\u30b7\u30b9\u30c6\u30e0\u3092\u6d17\u3044\u51fa\u3059\u3068\u304d\u306f\u3001\u81ea\u5206\u304c\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u3001\u3069\u3093\u306a\u30b7\u30b9\u30c6\u30e0\u306b\u95a2\u308f\u3063\u3066\u304d\u305f\u304b\u3082\u6574\u7406\u3057\u3066\u304a\u304f\u3068\u3001\u79fb\u884c\u306e\u62c5\u5f53\u3092\u4efb\u3055\u308c\u305f\u3068\u304d\u306b\u5f79\u7acb\u3061\u307e\u3059\u3002\u30b9\u30ad\u30eb\u30ed\u30b0\u306a\u3089\u6280\u8853\u3054\u3068\u306b\u81ea\u5df1\u8a55\u4fa1\u3068\u7d4c\u9a13\u5e74\u6570\u3092\u4e00\u89a7\u306b\u3067\u304d\u3001\u6848\u4ef6\u3054\u3068\u306b\u4f7f\u3063\u305f\u30d0\u30fc\u30b8\u30e7\u30f3\u3082\u8a18\u9332\u3067\u304d\u307e\u3059\u3002<\/p>\n<div style=\"clear:both;display:flex;justify-content:center;align-items:center;gap:12px;flex-wrap:wrap;margin:32px 0;padding:8px 0;line-height:1.6;\"><a href=\"https:\/\/skilllog.jp\/users\/sign_up?utm_source=blog&utm_medium=article&utm_campaign=dotnet-8-9-end-of-support\" style=\"background:#2563eb;color:#ffffff;padding:14px 28px;border-radius:8px;text-decoration:none;font-weight:700;text-align:center;white-space:nowrap;display:inline-block;line-height:1.4;\">\u4f7f\u3063\u305f\u6280\u8853\u3092\u4e00\u89a7\u306b\u3059\u308b<\/a><a href=\"#skilllog-consultation\" style=\"background:#06c755;color:#ffffff;padding:14px 28px;border-radius:8px;text-decoration:none;font-weight:700;text-align:center;white-space:nowrap;display:inline-block;line-height:1.4;\">\u8ee2\u8077\u30fb\u6848\u4ef6\u76f8\u8ac7\u3092\u3059\u308b<\/a><\/div>\n<div style=\"margin-top:48px;margin-bottom:24px;\">\n<h2 style=\"font-size:32px;font-weight:700;border-left:6px solid #2563eb;padding-left:16px;line-height:1.5;\"><span class=\"ez-toc-section\" id=\"NET_Framework%E3%81%AF%E5%88%A5%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E3%81%AE%E4%BB%95%E7%B5%84%E3%81%BF\"><\/span>.NET Framework\u306f\u5225\u306e\u30b5\u30dd\u30fc\u30c8\u306e\u4ed5\u7d44\u307f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div style=\"background:#eff6ff;border-left:4px solid #2563eb;padding:16px 20px;border-radius:6px;margin-bottom:24px;\">\n<p style=\"margin:0;font-size:15px;line-height:1.7;color:#1e3a5f;\">.NET Framework 4.8\u306fWindows\u306e\u90e8\u54c1\u3068\u3057\u3066\u6271\u308f\u308c\u3001\u4eca\u56de\u306e\u7d42\u4e86\u3068\u306f\u95a2\u4fc2\u3042\u308a\u307e\u305b\u3093\u3002<\/p>\n<\/div>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u540d\u524d\u304c\u4f3c\u3066\u3044\u307e\u3059\u304c\u3001.NET Framework\u3068\u3001.NET 8\u306a\u3069\u306e.NET\uff08\u65e7.NET Core\uff09\u306f\u5225\u306e\u88fd\u54c1\u3067\u3059\u3002.NET Framework\u306f\u3001Windows\u306e\u90e8\u54c1\u3068\u3057\u3066\u306e\u30b5\u30dd\u30fc\u30c8\u306e\u65b9\u91dd\u306b\u5f93\u3044\u307e\u3059\u3002<\/p>\n<table style=\"width:100%;border-collapse:collapse;margin:24px 0;\">\n<tr>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u30d0\u30fc\u30b8\u30e7\u30f3<\/th>\n<th style=\"border:1px solid #ddd;padding:12px;background:#1e40af;color:#ffffff;font-weight:700;text-align:left;\">\u30b5\u30dd\u30fc\u30c8<\/th>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">.NET Framework 4.8\u30fb4.8.1<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">\u7d42\u4e86\u65e5\u306e\u5b9a\u3081\u306a\u3057\uff08\u30a4\u30f3\u30b9\u30c8\u30fc\u30eb\u3055\u308c\u3066\u3044\u308bWindows\u306e\u30b5\u30dd\u30fc\u30c8\u306b\u5f93\u3046\uff09<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">.NET Framework 4.6.2<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#f8fafc;\">2027\u5e741\u670812\u65e5\u306b\u7d42\u4e86<\/td>\n<\/tr>\n<tr>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">.NET Framework 3.5 SP1<\/td>\n<td style=\"border:1px solid #ddd;padding:12px;background:#ffffff;\">2029\u5e741\u67089\u65e5\u306b\u7d42\u4e86<\/td>\n<\/tr>\n<\/table>\n<h3><span class=\"ez-toc-section\" id=\"NET_Framework_462%E3%82%82%E6%9C%9F%E9%99%90%E3%81%8C%E8%BF%91%E3%81%84\"><\/span>.NET Framework 4.6.2\u3082\u671f\u9650\u304c\u8fd1\u3044<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">.NET Framework 4.6.2\u3092\u5bfe\u8c61\u306b\u3057\u3066\u3044\u308b\u30a2\u30d7\u30ea\u306f\u30012027\u5e741\u6708\u306b\u671f\u9650\u3092\u8fce\u3048\u307e\u3059\u3002.NET 8\u30fb9\u306e\u78ba\u8a8d\u3068\u3042\u308f\u305b\u3066\u30014.8\u7cfb\u3078\u306e\u79fb\u884c\u304c\u5fc5\u8981\u304b\u3092\u78ba\u304b\u3081\u3066\u304a\u304d\u307e\u3057\u3087\u3046\u3002<\/p>\n<div style=\"margin-top:48px;margin-bottom:24px;\">\n<h2 style=\"font-size:32px;font-weight:700;border-left:6px solid #2563eb;padding-left:16px;line-height:1.5;\"><span class=\"ez-toc-section\" id=\"NET_10%E3%81%B8%E3%81%AE%E7%A7%BB%E8%A1%8C%E6%89%8B%E9%A0%86\"><\/span>.NET 10\u3078\u306e\u79fb\u884c\u624b\u9806<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div style=\"background:#eff6ff;border-left:4px solid #2563eb;padding:16px 20px;border-radius:6px;margin-bottom:24px;\">\n<p style=\"margin:0;font-size:15px;line-height:1.7;color:#1e3a5f;\">\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8a2d\u5b9a\u3092\u5909\u3048\u3001\u30e9\u30a4\u30d6\u30e9\u30ea\u3068\u5b9f\u884c\u74b0\u5883\u3092\u305d\u308d\u3048\u3066\u3001\u30c6\u30b9\u30c8\u3067\u78ba\u304b\u3081\u307e\u3059\u3002<\/p>\n<\/div>\n<ul style=\"margin:0 0 20px 0;padding-left:24px;line-height:1.9;\">\n<li>\u5bfe\u8c61\u3092\u6d17\u3044\u51fa\u3059\uff1a\u30b5\u30fc\u30d0\u30fc\u3001\u30a2\u30d7\u30ea\u3001\u30b3\u30f3\u30c6\u30ca\u3001\u793e\u5916\u306e\u88fd\u54c1\u3092\u4e00\u89a7\u306b\u3059\u308b<\/li>\n<li>\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u3092\u66f4\u65b0\u3059\u308b\uff1aTargetFramework\u3092 net10.0 \u306b\u5909\u3048\u308b<\/li>\n<li>\u30e9\u30a4\u30d6\u30e9\u30ea\u3092\u66f4\u65b0\u3059\u308b\uff1aNuGet\u306e\u30d1\u30c3\u30b1\u30fc\u30b8\u3092.NET 10\u306b\u5bfe\u5fdc\u3057\u305f\u7248\u306b\u3059\u308b<\/li>\n<li>\u4e92\u63db\u6027\u3092\u78ba\u304b\u3081\u308b\uff1aMicrosoft\u306e\u300c.NET 10\u306e\u7834\u58ca\u7684\u5909\u66f4\u300d\u306e\u4e00\u89a7\u3092\u78ba\u8a8d\u3059\u308b<\/li>\n<li>\u5b9f\u884c\u74b0\u5883\u3092\u66f4\u65b0\u3059\u308b\uff1a\u30b5\u30fc\u30d0\u30fc\u306e\u30e9\u30f3\u30bf\u30a4\u30e0\u3001\u30b3\u30f3\u30c6\u30ca\u306e\u30a4\u30e1\u30fc\u30b8\u3001\u30d3\u30eb\u30c9\u74b0\u5883\u306eSDK\u3092.NET 10\u306b\u3059\u308b<\/li>\n<li>\u30c6\u30b9\u30c8\u3057\u3066\u914d\u7f6e\u3059\u308b\uff1a\u52d5\u4f5c\u3068\u6027\u80fd\u3092\u78ba\u304b\u3081\u3066\u304b\u3089\u672c\u756a\u306b\u51fa\u3059<\/li>\n<\/ul>\n<h3><span class=\"ez-toc-section\" id=\"%E7%A7%BB%E8%A1%8C%E3%82%92%E5%8A%A9%E3%81%91%E3%82%8B%E8%B3%87%E6%96%99\"><\/span>\u79fb\u884c\u3092\u52a9\u3051\u308b\u8cc7\u6599<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">Microsoft\u306f\u3001\u79fb\u884c\u306e\u624b\u9806\u3092\u307e\u3068\u3081\u305f\u300cUpgrade to a new .NET version\u300d\u306e\u307b\u304b\u3001.NET Upgrade Assistant\u3084\u3001ASP.NET Core 9\u304b\u308910\u3078\u306e\u79fb\u884c\u30ac\u30a4\u30c9\u3092\u6848\u5185\u3057\u3066\u3044\u307e\u3059\u3002\u516c\u5f0f\u306e\u60c5\u5831\u306f<a href=\"https:\/\/devblogs.microsoft.com\/dotnet\/dotnet-8-9-end-of-support\/\" target=\"_blank\" rel=\"noopener\" style=\"color:#2563eb;text-decoration:underline;\">.NET\u306e\u516c\u5f0f\u30d6\u30ed\u30b0<\/a>\u3067\u78ba\u304b\u3081\u3089\u308c\u307e\u3059\u3002<\/p>\n<div style=\"margin-top:48px;margin-bottom:24px;\">\n<h2 style=\"font-size:32px;font-weight:700;border-left:6px solid #2563eb;padding-left:16px;line-height:1.5;\"><span class=\"ez-toc-section\" id=\"NET_8%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E7%B5%82%E4%BA%86%E3%81%AB%E7%A7%BB%E8%A1%8C%E3%81%8C%E9%96%93%E3%81%AB%E5%90%88%E3%82%8F%E3%81%AA%E3%81%84%E3%81%A8%E3%81%8D\"><\/span>.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306b\u79fb\u884c\u304c\u9593\u306b\u5408\u308f\u306a\u3044\u3068\u304d<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div style=\"background:#eff6ff;border-left:4px solid #2563eb;padding:16px 20px;border-radius:6px;margin-bottom:24px;\">\n<p style=\"margin:0;font-size:15px;line-height:1.7;color:#1e3a5f;\">\u30a4\u30f3\u30bf\u30fc\u30cd\u30c3\u30c8\u306b\u516c\u958b\u3057\u3066\u3044\u308b\u3082\u306e\u304b\u3089\u512a\u5148\u3057\u3066\u3001\u79fb\u884c\u306e\u8a08\u753b\u3092\u7acb\u3066\u307e\u3059\u3002<\/p>\n<\/div>\n<ul style=\"margin:0 0 20px 0;padding-left:24px;line-height:1.9;\">\n<li>\u512a\u5148\u9806\u4f4d\u3092\u3064\u3051\u308b\uff1a\u5916\u90e8\u306b\u516c\u958b\u3057\u3066\u3044\u308bWeb\u30a2\u30d7\u30ea\u3084API\u304b\u3089\u79fb\u884c\u3059\u308b<\/li>\n<li>\u671f\u9650\u3092\u6c7a\u3081\u308b\uff1a\u6b8b\u308b\u30b7\u30b9\u30c6\u30e0\u3054\u3068\u306b\u3001\u3044\u3064\u307e\u3067\u306b\u79fb\u884c\u3059\u308b\u304b\u3092\u6c7a\u3081\u308b<\/li>\n<li>\u5f71\u97ff\u3092\u8a18\u9332\u3059\u308b\uff1a\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u308f\u3063\u305f\u7248\u3092\u4f7f\u3063\u3066\u3044\u308b\u7406\u7531\u3068\u3001\u5bfe\u7b56\u306e\u72b6\u6cc1\u3092\u6b8b\u3059<\/li>\n<\/ul>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u308f\u3063\u305f\u7248\u306b\u306f\u3001\u8106\u5f31\u6027\u304c\u898b\u3064\u304b\u3063\u3066\u3082\u516c\u5f0f\u306e\u4fee\u6b63\u304c\u51fa\u307e\u305b\u3093\u3002PHP\u3067\u3082\u3001\u30b5\u30dd\u30fc\u30c8\u304c\u7d42\u308f\u3063\u305f\u7248\u306b\u306f\u7dca\u6025\u306e\u8106\u5f31\u6027\u306e\u4fee\u6b63\u304c\u51fa\u306a\u304b\u3063\u305f\u4f8b\u304c\u3042\u308a\u307e\u3059\u3002\u8a73\u3057\u304f\u306f<a href=\"https:\/\/skilllog.jp\/blog\/2026\/10\/22\/php-vulnerability-php2shell\/\" style=\"color:#2563eb;text-decoration:underline;\">PHP\u306e\u8106\u5f31\u6027\u300cphp2shell\u300d\u306e\u78ba\u8a8d\u65b9\u6cd5\u3068\u5bfe\u7b56<\/a>\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E7%A7%BB%E8%A1%8C%E3%81%AE%E7%B5%8C%E9%A8%93%E3%81%AF%E7%B5%8C%E6%AD%B4%E3%81%AE%E5%BC%B7%E3%81%BF%E3%81%AB%E3%81%AA%E3%82%8B\"><\/span>\u79fb\u884c\u306e\u7d4c\u9a13\u306f\u7d4c\u6b74\u306e\u5f37\u307f\u306b\u306a\u308b<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u30d0\u30fc\u30b8\u30e7\u30f3\u306e\u79fb\u884c\u306f\u3001\u5f71\u97ff\u306e\u8abf\u67fb\u3001\u8a08\u753b\u3001\u30c6\u30b9\u30c8\u3001\u5207\u308a\u66ff\u3048\u307e\u3067\u3092\u4e00\u901a\u308a\u7d4c\u9a13\u3067\u304d\u308b\u4ed5\u4e8b\u3067\u3059\u3002\u62c5\u5f53\u3057\u305f\u30b7\u30b9\u30c6\u30e0\u306e\u6570\u3084\u671f\u9593\u3001\u4f7f\u3063\u305f\u624b\u6cd5\u3092\u8a18\u9332\u3057\u3066\u304a\u304f\u3068\u3001\u30b9\u30ad\u30eb\u30b7\u30fc\u30c8\u3067\u4f1d\u3048\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002\u6280\u8853\u306e\u66f8\u304d\u65b9\u306f<a href=\"https:\/\/skilllog.jp\/blog\/2026\/07\/22\/skill-sheet-technology-writing-guide\/\" style=\"color:#2563eb;text-decoration:underline;\">\u30b9\u30ad\u30eb\u30b7\u30fc\u30c8\u306e\u6280\u8853\u306e\u66f8\u304d\u65b9<\/a>\u3082\u53c2\u8003\u306b\u3057\u3066\u304f\u3060\u3055\u3044\u3002<\/p>\n<h3><span class=\"ez-toc-section\" id=\"%E7%A7%BB%E8%A1%8C%E3%81%AE%E7%B5%8C%E9%A8%93%E3%82%92%E3%82%B9%E3%82%AD%E3%83%AB%E3%83%AD%E3%82%B0%E3%81%A7%E6%AE%8B%E3%81%99%E7%90%86%E7%94%B1\"><\/span>\u79fb\u884c\u306e\u7d4c\u9a13\u3092\u30b9\u30ad\u30eb\u30ed\u30b0\u3067\u6b8b\u3059\u7406\u7531<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u79fb\u884c\u306e\u4ed5\u4e8b\u306f\u3001\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u304b\u3089\u3069\u306e\u30d0\u30fc\u30b8\u30e7\u30f3\u3078\u3001\u4f55\u4ef6\u306e\u30b7\u30b9\u30c6\u30e0\u3092\u3001\u3069\u3093\u306a\u624b\u9806\u3067\u79fb\u3057\u305f\u304b\u3092\u66f8\u3051\u308b\u3068\u8a55\u4fa1\u306b\u3064\u306a\u304c\u308a\u307e\u3059\u3002Excel\u3084Word\u3067\u7d4c\u6b74\u3092\u66f8\u304d\u8db3\u3057\u3066\u3044\u304f\u3068\u3001\u6848\u4ef6\u3054\u3068\u306b\u66f8\u304f\u9805\u76ee\u304c\u3070\u3089\u3064\u304d\u3001\u30d0\u30fc\u30b8\u30e7\u30f3\u3084\u898f\u6a21\u304c\u629c\u3051\u3084\u3059\u304f\u306a\u308a\u307e\u3059\u3002<a href=\"https:\/\/skilllog.jp\/?utm_source=blog&utm_medium=body_link&utm_campaign=dotnet-8-9-end-of-support\" style=\"color:#2563eb;text-decoration:underline;\">\u30b9\u30ad\u30eb\u30ed\u30b0<\/a>\u3067\u8a18\u9332\u3059\u308b\u3068\u3001\u6b21\u306e\u70b9\u3067\u697d\u306b\u306a\u308a\u307e\u3059\u3002<\/p>\n<ul style=\"margin:0 0 20px 0;padding-left:24px;line-height:1.9;\">\n<li>\u9805\u76ee\u304c\u305d\u308d\u3046\uff1a\u6848\u4ef6\u3054\u3068\u306b\u671f\u9593\u30fb\u5f79\u5272\u30fb\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u898f\u6a21\u30fb\u30c1\u30fc\u30e0\u898f\u6a21\u30fb\u696d\u7a2e\u30fb\u62c5\u5f53\u5de5\u7a0b\u30fb\u6210\u679c\u3092\u540c\u3058\u9805\u76ee\u3067\u5165\u529b\u3059\u308b\u306e\u3067\u3001\u66f8\u304d\u6f0f\u308c\u304c\u306a\u304f\u3001\u6848\u4ef6\u3069\u3046\u3057\u3092\u6bd4\u3079\u3084\u3059\u3044<\/li>\n<li>\u4f53\u88c1\u3092\u6574\u3048\u308b\u624b\u9593\u304c\u306a\u3044\uff1a\u5165\u529b\u3057\u305f\u5185\u5bb9\u306fPDF\u51fa\u529b\u3067\u4f53\u88c1\u306e\u6574\u3063\u305f\u30b9\u30ad\u30eb\u30b7\u30fc\u30c8\u306b\u306a\u308a\u3001\u65b0\u3057\u3044\u6848\u4ef6\u3092\u8db3\u3057\u305f\u3089\u305d\u306e\u307e\u307e\u51fa\u3057\u76f4\u305b\u308b<\/li>\n<li>\u4f38\u3073\u305f\u30b9\u30ad\u30eb\u304c\u898b\u3048\u308b\uff1a\u30b9\u30ad\u30eb\u3054\u3068\u306bS\u30fbA\u30fbB\u306a\u3069\u306e\u81ea\u5df1\u8a55\u4fa1\u3068\u7d4c\u9a13\u5e74\u6570\u3092\u4e26\u3079\u3066\u78ba\u8a8d\u3067\u304d\u3001\u6b21\u306b\u4f38\u3070\u3059\u3068\u3053\u308d\u304c\u5206\u304b\u308b<\/li>\n<\/ul>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">\u79fb\u884c\u3084\u4fdd\u5b88\u306e\u7d4c\u9a13\u304c\u3001\u6c42\u4eba\u3084\u6848\u4ef6\u3067\u3069\u3046\u8a55\u4fa1\u3055\u308c\u305d\u3046\u304b\u3092\u3001<a href=\"#skilllog-consultation\" style=\"color:#2563eb;text-decoration:underline;\">\u8ee2\u8077\u30fb\u6848\u4ef6\u76f8\u8ac7<\/a>\u3067\u4e00\u7dd2\u306b\u78ba\u304b\u3081\u308b\u3053\u3068\u3082\u3067\u304d\u307e\u3059\u3002<\/p>\n<div style=\"margin-top:48px;margin-bottom:24px;\">\n<h2 style=\"font-size:32px;font-weight:700;border-left:6px solid #2563eb;padding-left:16px;line-height:1.5;\"><span class=\"ez-toc-section\" id=\"%E3%81%BE%E3%81%A8%E3%82%81\"><\/span>\u307e\u3068\u3081<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div style=\"background:#eff6ff;border-left:4px solid #2563eb;padding:16px 20px;border-radius:6px;margin-bottom:24px;\">\n<p style=\"margin:0;font-size:15px;line-height:1.7;color:#1e3a5f;\">.NET 8\u3068.NET 9\u306f2026\u5e7411\u670810\u65e5\u306b\u7d42\u4e86\u3002\u5bfe\u8c61\u3092\u78ba\u304b\u3081\u3001.NET 10\u3078\u79fb\u308a\u307e\u3057\u3087\u3046\u3002<\/p>\n<\/div>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306f2026\u5e7411\u670810\u65e5\u3067\u3001.NET 9\u3082\u540c\u3058\u65e5\u306b\u7d42\u308f\u308a\u307e\u3059\u3002\u7d42\u4e86\u5f8c\u3082\u30a2\u30d7\u30ea\u306f\u52d5\u304d\u307e\u3059\u304c\u3001\u30bb\u30ad\u30e5\u30ea\u30c6\u30a3\u66f4\u65b0\u306f\u51fa\u306a\u304f\u306a\u308a\u307e\u3059\u3002dotnet\u30b3\u30de\u30f3\u30c9\u3068\u30d7\u30ed\u30b8\u30a7\u30af\u30c8\u306e\u8a2d\u5b9a\u3067\u5bfe\u8c61\u3092\u78ba\u304b\u3081\u3001\u81ea\u5df1\u5b8c\u7d50\u578b\u3084\u30b3\u30f3\u30c6\u30ca\u3082\u542b\u3081\u3066\u30012028\u5e7411\u6708\u307e\u3067\u30b5\u30dd\u30fc\u30c8\u3055\u308c\u308b.NET 10\u3078\u306e\u79fb\u884c\u3092\u9032\u3081\u307e\u3057\u3087\u3046\u3002<\/p>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">.NET Framework 4.8\u306f\u5225\u306e\u4ed5\u7d44\u307f\u3067\u4eca\u56de\u306e\u5bfe\u8c61\u5916\u3067\u3059\u304c\u30014.6.2\u306f2027\u5e741\u6708\u306b\u671f\u9650\u3092\u8fce\u3048\u307e\u3059\u3002\u30b9\u30ad\u30eb\u30b7\u30fc\u30c8\u5168\u4f53\u306e\u66f8\u304d\u65b9\u306f<a href=\"https:\/\/skilllog.jp\/blog\/2026\/09\/13\/skill-sheet-writing-guide-complete\/\" style=\"color:#2563eb;text-decoration:underline;\">\u30b9\u30ad\u30eb\u30b7\u30fc\u30c8\u306e\u66f8\u304d\u65b9\u5b8c\u5168\u30ac\u30a4\u30c9<\/a>\u3067\u89e3\u8aac\u3057\u3066\u3044\u307e\u3059\u3002<\/p>\n<div style=\"margin-top:48px;margin-bottom:24px;\">\n<h2 style=\"font-size:32px;font-weight:700;border-left:6px solid #2563eb;padding-left:16px;line-height:1.5;\"><span class=\"ez-toc-section\" id=\"%E3%82%88%E3%81%8F%E3%81%82%E3%82%8B%E8%B3%AA%E5%95%8F\"><\/span>\u3088\u304f\u3042\u308b\u8cea\u554f<span class=\"ez-toc-section-end\"><\/span><\/h2>\n<\/div>\n<div style=\"background:#eff6ff;border-left:4px solid #2563eb;padding:16px 20px;border-radius:6px;margin-bottom:24px;\">\n<p style=\"margin:0;font-size:15px;line-height:1.7;color:#1e3a5f;\">.NET\u306e\u30b5\u30dd\u30fc\u30c8\u7d42\u4e86\u306b\u3064\u3044\u3066\u3001\u3088\u304f\u5bc4\u305b\u3089\u308c\u308b\u8cea\u554f\u3092\u307e\u3068\u3081\u307e\u3057\u305f\u3002<\/p>\n<\/div>\n<h3><span class=\"ez-toc-section\" id=\"NET_8%E3%81%AE%E3%82%B5%E3%83%9D%E3%83%BC%E3%83%88%E3%81%AF%E3%81%84%E3%81%A4%E3%81%BE%E3%81%A7%E3%81%A7%E3%81%99%E3%81%8B%EF%BC%9F\"><\/span>.NET 8\u306e\u30b5\u30dd\u30fc\u30c8\u306f\u3044\u3064\u307e\u3067\u3067\u3059\u304b\uff1f<span class=\"ez-toc-section-end\"><\/span><\/h3>\n<p style=\"margin:0 0 20px 0;line-height:1.9;\">2026\u5e7411\u670810\u65e5\uff08\u7c73\u56fd\u6642\u9593\uff09\u307e\u3067\u3067\u3059\u3002.NET 9\u3082\u540c\u3058\u65e5\u306b\u7d42\u308f\u308a\u307e\u3059\u3002<\/p>\n<h3><span class=\"ez-toc-section\" 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