c# 事件传值

 public partial class Form1 : Form
    {
        
        public Form1()
        {
            InitializeComponent();
        }

        private void button1_Click(object sender, EventArgs e)
        {
            Form2 f = new Form2();
            f.a += F_a1;
         //   f.Wt = (string a, string b) => { this.Text = a; }; //setText;
             f.ShowDialog();
        }

        private void F_a1(object sender, EventArgs e)
        {


            this.Text =  (e as Myevent).names ;
            button2.Text = (e as Myevent).names;

        }

      

        void setText(string a,string b ){

            this.Text = a;
            
            }

        private void button2_Click(object sender, EventArgs e)
        {
           
        }

  public partial class Form2 : Form
    {

        public delegate void wt(string a, string b);

        public event EventHandler a;

        public wt Wt;
        public Form2()
        {
            InitializeComponent();
        }

        private void Form2_Load(object sender, EventArgs e)
        {

        }

        private void button1_Click(object sender, EventArgs e)
        {
            if (Wt != null)
            {
                Wt(textBox1.Text, "aa");
            }

            if (a != null)
            {
                a(this, new Myevent() { names = textBox1.Text });
            }
        }

       
    }

    public class Myevent : EventArgs
    {
        public string names { get; set; }

    }