在C＃中的UserControl中创建一个ButtonClick事件

Question

I create the ButtonClick event in the UserControl below and want to handle it in a Form, but I get an error that says 'The name UserControl1.ButtonClick' does not exist in the current context.

public partial class UserControl1 : UserControl
{
        public UserControl1()
    {
        InitializeComponent();
    }
        public event EventHandler ButtonClick;


    private void btnUpdate_Click(object sender, EventArgs e)
    {
        if (this.ButtonClick != null)
            this.ButtonClick(this, e);
    }

Form:

        UserControl1.ButtonClick += new EventHandler(UserControl_ButtonClick);



    protected void UserControl_ButtonClick(object sender, EventArgs e)
    {
      //handle the event
    }

Answer 1

Form:

public PatientNumber()
        {
            InitializeComponent();
            userControl11.updateButton.Click += button_Click;
        }

        protected void button_Click(object sender, EventArgs e)
        {
     　　　 //handle the event
        }

UserControl:

public Button btnUpdatee
{
    get
    {
        return btnUpdate;
    }
    set
    {
        btnUpdate = value;
    }
}

This code worked. Thank you