Static在C#语言中的格式是什么呀？

using System;

using System.Collections.Generic;

using System.Linq;

using System.Text;

using System.Threading.Tasks;

namespace MyNamespace

{

class Program

{

    public static void Main(string[] args)

    {

        Console.WriteLine("返回数组的和");

        int[] values = { 1,2,3,4,5};

        int sum = Sum(values);

        Console.WriteLine(sum);

     }

     //计算数组的和

     static int Sum(int[] valuesValue)

     {

         int sum = 0;

         for (int i = 0; i < valuesValue.Length; i++)

         {

         sum = sum + valuesValue[i];

          }

        return sum;

    }

}

}