C#里List.Sort的用法

using System; using System.Collections.Generic; using System.Linq; using System.Text;    namespace ListSort {     class Program     {         static void Main(string[] args)         {             List L = new List();             L.Add(new C { n = 1, s = "b" });             L.Add(new C { n = 3, s = "a" });             L.Add(new C { n = 2, s = "c" });             // 方法1 使用Comparison委托。             L.Sort((left, right) =>             {                 if (left.n > right.n)                     return 1;                 else if (left.n == right.n)                     return 0;                 else                     return -1;             });                // 方法2 使用IComparer接口。             L.Sort(new CComparer());                // 方法3 除以上两种方法以外还可以使用另一种方法，在C类中实现IComparable             L.Sort();         }     }

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//方法二    public class CComparer : IComparer    {        public int Compare(C left, C right)        {            if (left.n > right.n)                return 1;            else if (left.n == right.n)                return 0;            else                return -1;        }    }

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//方法三     public class C : IComparable     {         public int n;         public string s;            public int CompareTo(C other)         {             if (this.n > other.n)                 return 1;             else if (this.n == other.n)                 return 0;             else                 return -1;         }     } }