C#判斷一個類中有無指定名稱的方法

C#中可以通過反射分析元數據來解決這個問題，示例代碼如下：

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using?System; using?System.Reflection; namespace?Hello { ????class?Program ????{ ????????static?void?Main(string[] args) ????????{ ????????????if?(IsMethodDefined(typeof(Utils),?"HelloWorld")) ????????????{ ????????????????Console.WriteLine("Utils類中有方法HelloWorld"); ????????????} ????????????else ????????????{ ????????????????Console.WriteLine("Utils類中沒有方法HelloWorld"); ????????????} ????????????Console.ReadKey(); ????????}???? ???????? ????????/// <summary> ????????/// 判斷一個類中有無"指定名稱"的方法 ????????/// </summary> ????????/// <param name="type"></param> ????????/// <param name="methodName"></param> ????????/// <returns></returns> ????????static?bool?IsMethodDefined(Type type,string?methodName) ????????{ ????????????bool?result =?false; ????????????foreach?(MemberInfo m?in?type.GetMembers()) ????????????{ ????????????????if?(m.Name == methodName) ????????????????{ ????????????????????result =?true; ????????????????????break; ????????????????} ????????????} ????????????return?result; ????????} ????} ????public?static?class?Utils ????{ ????????public?static?void?HelloWorld() ????????{ ????????????Console.WriteLine("Hello World!"); ????????} ????} }