Web Forms :: Unable To Access Master Page Control?

Apr 26, 2010

I am using asp.net 3.5 with C# to build web application. I am using master pages. I had a label in masterpage. I want to set some text in that label from content page. I have written following code for that

Label lbl = (Label)Master.FindControl("lblUserName");
lbl.Text = "Guest";

but it is giving an exception "Object reference not set to an instance of an object." What could be the problem, if sombody can put some light on it.

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