在c＃中显示一个类的消息框？

如何让课程与表单进行交互以显示消息框？

Answer 1

using System.Windows.Forms; ... MessageBox.Show("Hello World!"); 

Answer 2

 System.Windows.MessageBox.Show("Hello world"); //WPF System.Windows.Forms.MessageBox.Show("Hello world"); //WinForms 

Answer 3

试试这个：

 System.Windows.Forms.MessageBox.Show("Here's a message!"); 

Answer 4

 using System.Windows.Forms; public class message { static void Main() { MessageBox.Show("Hello World!"); } }