对象引用对于非静态的字段、方法、属性Program.Print()是必需的

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace 值类型1
{
    class Program
    {
        static void Main(string[] args)
        {
            Print();
        }
        public void Print()
        {
            Console.Write("Hello");
        }
        public void Print(string name)
        {
            Console.Write("Hello"+ name);
        }
    }
}