msdn List sort排序 IComparable 用法

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication5
{
class Program
{
static void Main(string[] args)
{
List<PermCategory> list = new List<PermCategory>();
list.Add(new PermCategory { CateId = 1, Name = "ad5", Perm = 1, Summary = "ada5" });
list.Add(new PermCategory { CateId=1,Name="ad",Perm=1,Summary="ada"});
list.Add(new PermCategory { CateId = 1, Name = "ad4", Perm = 1, Summary = "ada4" });
list.Add(new PermCategory { CateId = 2, Name = "a1d", Perm = 2, Summary = "a1da" });
list.Add(new PermCategory { CateId = 2, Name = "ad", Perm = 2, Summary = "ada" });
Console.WriteLine("排序前");
test(list);

list.Sort((x, y) => {
int result = 0;

// result -1小到大 ,  1大到小
#region A:perm 小到大，name 长度 小到大
//if (x.Perm < y.Perm)
//{
// result = -1;
//}
//if (x.Perm < y.Perm || x.Name.Length < y.Name.Length)
//{
// result = -1;
//}
#endregion
#region A:perm 小到大，name 长度 小到大
//if (x.Perm < y.Perm)
//{
// result = -1;
//}
//if (x.Perm == y.Perm && x.Name.Length < y.Name.Length)
//{
// result = -1;
//}
#endregion

#region A:perm 小到大，name 长度 大到小
if (x.Perm < y.Perm)
{
result = -1;
}
if (x.Perm == y.Perm && x.Name.Length > y.Name.Length)
{
result = -1;
}
#endregion
return result;
});
Console.WriteLine("---------------------");
test(list);
Console.WriteLine("排序后");
Console.ReadLine();

}
static void test(List<PermCategory> list) {
foreach (var item in list)
{
Console.WriteLine(string.Format("perm:{0},name:{1}",item.Perm,item.Name));
}
}
}
public class PermCategory //: IJsonlizable
{
// public PermCategory();

public int CateId { get; set; }

public string Name { get; set; }
public int Perm { get; set; }

public string Summary { get; set; }

// public string Jsonlize();
}
}

http://www.cnblogs.com/dj1232090/p/5844991.html