Below code is not working,pls suggest

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I have a small user control having a textbox and a button in it. I have a label in my page which consuming the usercontrol,on button click event of user control I am finding out the area of user input value and want to display that area in lebel in main page.

public partial class WebUserControl1 : System.Web.UI.UserControl
{
   public delegate void myeventhandler(object sender,MyEventArgs e);       

    public event myeventhandler MyEvent;        

     protected void Button1_Click(object sender, EventArgs e)
     {
       int radious= Convert.ToInt32(TextBox1.Text);
       double area = 3.14 * radious * radious;          
       MyEventArgs myeventargs = new MyEventArgs();
       myeventargs.Area = area;
       MyEvent(this, myeventargs);        

    }        

}
public class MyEventArgs : EventArgs
{
    public double Area { set; get; }

}

in the main page I have written the below code:

public partial class _Default : System.Web.UI.Page
{
    protected void Page_Load(object sender, EventArgs e)
    {
        WebUserControl1 objuc = new WebUserControl1();           
        objuc.MyEvent += new WebUserControl1.myeventhandler(DisplayArea);             

    }

    public void DisplayArea(object sender,MyEventArgs e) 
    {
            Label1.Text   = e.Area.ToString();       

    }
}

But I am getting a NullReferenceError on line
      MyEvent(this, myeventargs); 

any help would be appreciated

asked 26 secs ago

user2900724

1