delegate关键字与Delegate类型

今天写了一个例子，能说明delegate和Delegate的不同，帖在下面，注释很全：

 1 using System;
 2 using System.Collections.Generic;
 3 using System.Text;
 4 using System.Resources;
 5 using System.Reflection;
 6 using System.Globalization;
 7 
 8 namespace ConsoleApplication
 9 {
   /*
    * 在这个位置，由于delegate关键字，编译器会为我们生成一个类型 ConsoleApplication.TestDel (继承自System.MulticastDelegate)
    * 而这个类型的构造器定义为：
    * .method public hidebysig specialname rtspecialname 
         instance void  .ctor(object 'object',
                              native int 'method') runtime managed
       {
       } // end of method TestDel::.ctor
    */
   delegate int TestDel(int i);
 
   class UseDelegate
   {
     /*
      * .method public hidebysig static string  Compute(class ConsoleApplication.TestDel del,
                                                 int32 input) cil managed
      */
     public static string Compute(TestDel del, int input)
     {
       return del(input).ToString();
     }
 
     /*
      * .method public hidebysig static string  ComputeTwo(class [mscorlib]System.Delegate del,
                                                    int32 input) cil managed
      */
     public static string ComputeTwo(Delegate del, int input)
     {
       return null;
     }
   }
 
 
   class Program
   {
     static void Main(string[] args)
     {
       int k = 5;
 
       /*
        *  IL_0004:  ldftn      int32 ConsoleApplication.Program::MyMethodOne(int32)
           IL_000a:  newobj     instance void ConsoleApplication.TestDel::.ctor(object,
                                                                                native int)
           IL_000f:  ldloc.0
           IL_0010:  call       string ConsoleApplication.UseDelegate::Compute(class ConsoleApplication.TestDel,
                                                                               int32)
           IL_0015:  call       void [mscorlib]System.Console::WriteLine(string)
        */
       Console.WriteLine(UseDelegate.Compute(MyMethodOne, k));
       Console.WriteLine(UseDelegate.Compute(MyMethodTwo, k));
 
       /*
        * IL_0034:  ldftn      int32 ConsoleApplication.Program::MyMethodOne(int32)
         IL_003a:  newobj     instance void ConsoleApplication.TestDel::.ctor(object,
                                                                              native int)
         IL_003f:  ldloc.0
         IL_0040:  call       string ConsoleApplication.UseDelegate::ComputeTwo(class [mscorlib]System.Delegate,
                                                                                int32)
         IL_0045:  call       void [mscorlib]System.Console::WriteLine(string)
        */
       Console.WriteLine(UseDelegate.ComputeTwo(new TestDel(MyMethodOne), k));
 
       Console.Read();
     }
 
     private static int MyMethodOne(int i)
     {
       return (i++);
     }
 
     private static int MyMethodTwo(int i)
     {
       return (i--);
     }
 
   }
 
 }