在c＃中显示一个类的消息框？

Question

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!"); 
    }
}