在窗体Form2中定义公有属性Form2Value,获取和设置textBox1的文本值 并且还定义一个accept事件public string Form2Value {      get      {           return this.textBox1.Text;      }      set     {          this.textBox1.Text = value;     } } public event EventHandler accept; private void button1_Click ( object sender , EventArgs e ) {      if ( accept != null )      {           accept ( this , EventArgs.Empty ); //当窗体触发事件，传递自身引用      } } 在窗体Form1中Form2 f2 = new Form2 ( ); f2.accept += new EventHandler ( f2_accept ); f2.Show ( ); void f2_accept ( object sender , EventArgs e ){      //事件的接收者通过一个简单的类型转换得到Form2的引用      Form2 f2 = (Form2) sender;      //接收到Form2的textBox1.Text      this.textBox1.Text = f2.Form2Value; }