c# 实现类库并调用

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

namespace ClassLibrary
{
    public class Person
    {
        private string name;

        public Person(string name)
        {
            this.name = name;
        }

        public void sayHello()
        {
            Console.WriteLine("Hello Everyone!");
        }

    }
}

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

namespace ClassLibraryTest
{
    class Program
    {
        static void Main(string[] args)
        {
            ClassLibrary.Person Jack = new ClassLibrary.Person("Jack");
            Jack.sayHello();

            Console.ReadKey();
        }
    }
}