In User Control cs file:

there is a textbox n a button in user Control

On Button Click we want to display the textbox's text on page which is rendering the user control

protected void Button1_Click(object sender, EventArgs e)
{
this.Page.GetType().InvokeMember("DisplayMessage", System.Reflection.BindingFlags.InvokeMethod, null, this.Page, new object[] { TextBox1.Text });
}


In Default.aspx.cs

Drag the user control

public void DisplayMessage(string message)
{
Response.Write(message);
}

Thanks
RajShree Mittal