how to find masterpage radmenu itemtemplate linkbutton click event in its childpage

Please try this
On the content page Pageload function

Button b=MasterPage.findCotrol("MasterButton1");

b.click+=new eventHandler(eventname);

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Else

In your master page's code behind replace the protected keyword on the event handler to public.

public void LinkButton1_Click(object sender, EventArgs e) { //Do Stuff Here }

In the code behind for the content page call the Master event handler as follows

protected void ImageButton1_Click(object sender, ImageClickEventArgs e)
{
this.Master.LinkButton1_Click(sender, e);
}

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