实现Linq.Distinct方法

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

namespace Microsoft.Windows.System.PerfCounters
{
    public sealed class Program
    {
        static void Main(string[] args)
        {
            List<MyClass> s = new List<MyClass>();
            s.Add(new MyClass { Age = 78 });
            s.Add(new MyClass { Age = 18 });
            s.Add(new MyClass { Age = 18 });
            s.Add(new MyClass { Age = 8 });
            s.Add(new MyClass { Age = 8 });
            s.Add(new MyClass { Age = 58 });
            s.Add(new MyClass { Age = 98 });
            s.Add(new MyClass { Age = 98 });

            s.Sort();
            var q = s.Distinct(new MyClass()).ToList();

            foreach (var item in q)
            {
                Console.WriteLine(item.Age);
            }

            List<int> a = new List<int>();
            a.Add(1);
            a.Add(2);
            a.Add(1);
            a.Add(5);
            a.Add(1);
            a.Add(6);

            var b = a.Distinct();
            foreach (var item in b)
            {
                Console.WriteLine(item);
            }
        }
    }

    class MyClass : IComparable<MyClass>, IEqualityComparer<MyClass>
    {
        public int Age { get; set; }

        public int CompareTo(MyClass other)
        {
            return this.Age.CompareTo(other.Age);
        }

        public bool Equals(MyClass x, MyClass y)
        {
            return x.Age == y.Age;
        }

        public int GetHashCode(MyClass obj)
        {
            return obj.Age.GetHashCode();
        }
    }
}

　　实现Distinct方法。

同样的还有sort还有其他的方法。