C# の汎用デリゲートとは何ですか?

delegate T myDelegete<T>(T n);

using System;
using System.Collections.Generic;

delegate T myDelegete<T>(T n);
namespace GenericDelegateAppl {
   class TestDelegate {
      static int num = 5;

      public static int AddNum(int p) {
         num += p;
         return num;
      }

      public static int MultNum(int q) {
         num *= q;
         return num;
      }

      public static int getNum() {
         return num;
      }

      static void Main(string[] args) {
         //create delegate instances
         NumberChanger nc1 = new NumberChanger(AddNum);
         NumberChanger nc2 = new NumberChanger(MultNum);

         //calling the methods using the delegate objects
         nc1(50);
         Console.WriteLine("Value of Num: {0}", getNum());

         nc2(10);
         Console.WriteLine("Value of Num: {0}", getNum());
         Console.ReadKey();
      }
   }
}