{"version":"1.0","provider_name":"Hatena Blog","categories":["C#","C# - \u62e1\u5f35\u30e1\u30bd\u30c3\u30c9"],"width":"100%","image_url":"https://cdn-ak.f.st-hatena.com/images/fotolife/b/baba_s/20180826/20180826160156.png","type":"rich","blog_url":"https://baba-s.hatenablog.com/","blog_title":"\u30b3\u30ac\u30cd\u30d6\u30ed\u30b0","title":"\u3010C#\u3011\u30c7\u30ea\u30b2\u30fc\u30c8\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u8fd4\u3059\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9","author_name":"baba_s","height":"190","published":"2015-07-28 10:00:00","author_url":"https://blog.hatena.ne.jp/baba_s/","html":"<iframe src=\"https://hatenablog-parts.com/embed?url=https%3A%2F%2Fbaba-s.hatenablog.com%2Fentry%2F2015%2F07%2F28%2F100000\" title=\"\u3010C#\u3011\u30c7\u30ea\u30b2\u30fc\u30c8\u304c\u767b\u9332\u3055\u308c\u3066\u3044\u308b\u304b\u3069\u3046\u304b\u3092\u8fd4\u3059\u62e1\u5f35\u30e1\u30bd\u30c3\u30c9 - \u30b3\u30ac\u30cd\u30d6\u30ed\u30b0\" class=\"embed-card embed-blogcard\" scrolling=\"no\" frameborder=\"0\" style=\"display: block; width: 100%; height: 190px; max-width: 500px; margin: 10px 0px;\"></iframe>","url":"https://baba-s.hatenablog.com/entry/2015/07/28/100000","description":"\u30bd\u30fc\u30b9\u30b3\u30fc\u30c9 using System; public static class MulticastDelegateExtensions { public static bool IsNullOrEmpty( this MulticastDelegate self ) { if ( self == null || self.GetInvocationList() == null ) { return true; } return self.GetInvocationList().Length == 0; } } Action act = null; act.IsNullOrEmpty(); \u95a2\u2026","provider_url":"https://hatena.blog"}