C# 错误消息：CS1503Argument 1：无法从“void”转换为“bool”

Question

Does anybody can help me with this issue? I can't run this code on VS. It's displaying Cannot convert from "void" to bool. I got stuck here and I can't run this piece of code.

Any idea about where the issue is?

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



    namespace HelloWorld
    {
        class Program
        {
            static void Main(string[] args, Array array)
            {
                int[] newAge = { 21, 31, 41, 51, 61 };
                int[] olderAge = { 71, 81, 91, 101, 121 };
                //int i = newAge.Length;


                Console.WriteLine(Array.Copy(newAge, olderAge, 4));
            }


        }
    }

Answer 1

Array.Copy doesn't return anything. So there's nothing to write to the console. Simply remove that Console.WriteLine operation:

Array.Copy(newAge, olderAge, 4);

Then the question becomes... What do you want to write to the console? For example, if you want to output the contents of one of the arrays, output that:

Console.WriteLine(string.Join(',', newAge));

This would join the values from newAge into a comma-delimited string and write that string to the console.