c#引用同一命名空间下的其他类

总体结构

Class1的内容

using System.Windows.Forms;
namespace demo1
{
    internal class Class1
    {
        public class HelperClass
        {
            public void DoSomething()
            {
                MessageBox.Show("Doing something useful...");                
            }           
        }
    }
}

Class2的内容

using System.Windows.Forms;
namespace demo1
{
    internal class Class2
    {
        public class HelperClass2
        {
            public void DoSomething2()
            {
                MessageBox.Show("Doing something useful...");
            }
        }
    }
}

界面上放一个按键

using System;
using System.Windows.Forms;
using static demo1.Class1;

namespace demo1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        private void button1_Click(object sender, EventArgs e)
        {
            HelperClass helper1 = new HelperClass(); // 创建 HelperClass 的实例
            helper1.DoSomething(); // 调用 DoSomething 方法

            Class2.HelperClass2 helper2 = new Class2.HelperClass2(); // 创建 HelperClass 的实例
            helper2.DoSomething2(); // 调用 DoSomething 方法
        }
       
    }
}