Question

c#linq 判断是否有重复

Answer 1

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

namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            //重复显示False，否则显示True
            List<int> Numbers = new List<int> { 1, 2, 3, 7, 31 };
            Console.WriteLine(Numbers.Distinct().Count() == Numbers.Count);
            Console.ReadKey();
        }
    }
}

举了个例子