c# winfrom 委托实现窗体相互传值

//声明委托
public delegate void MyDelMsg(string msg);
//定义一个委托变量
public  MyDelMsg myDelMsg;

private void button1_Click(object sender, EventArgs e)
{
       if (myDelMsg!=null)
       {
             //调用
             myDelMsg(textBox1.Text);
             this.Close();
        }
}

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 frm = new Form2(textBox1.Text);
            frm.myDelMsg = new Form2.MyDelMsg(RMsg);
            frm.ShowDialog();
        }

        private void RMsg(string msg)
        {
            textBox1.Text = msg;
        }