W3School TIY Editor

using System;

using System.Linq;

​

namespace MyApplication

{

  class Program

  {

    static void Main(string[] args)

    {

      int[] myNumbers = {5, 1, 8, 9};

      Console.WriteLine(myNumbers.Max());  // 最大值

      Console.WriteLine(myNumbers.Min());  // 最小值

      Console.WriteLine(myNumbers.Sum());  // myNumbers 数组的和

    }

  }

}