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http://blogs.interfacett.com This video tutorial demonstrates the affect that the UpdatePanel's UpdateMode and ChildrenAsTriggers properties have on updating a panel's content. The video starts out by discussing the UpdateMode property and shows why you may want to know about it when using multiple UpdatePanel controls on a single page. It then discusses the ChildrenAsTriggers property and shows how you can prevent child controls from updating their parent UpdatePanel control. Examples of nesting UpdatePanel controls to provide a master-details style view of data is also shown.