C# List.Sort 方法 的用法

public void Func1()
{
  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。
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;
       }
   }

// 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
    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;
        }
    }
}