Accessing a Master Page in ASP.Net can seem trivial for someone coming from an open source background. But once you start to understand the Massive helper methods that .NET provides it starts to get a little easier.

There are several different ways of accessing the MasterPage, but for this post I will be covering the FindControl Method and casting it to the correct object to access the properties.

Source code

Panel myPanel = (Panel)Master.FindControl("pnlMyPanel");
 myPanel.Attributes["class"] = ""; // clears the class

In the example above I used it to access the <asp:Panel> with the ID of “pnlMyPanel” and change the Attributes["class"] to be empty. Once you use the FindControl to search the Master you must cast what it locates to the correct object. Pretty Simple.