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Hi Is there any way to display the Group Row's without itemsource binding to Radgridview silverlight. For Example Group Rows 1,A 2,B 3,C Initally there wont be any rows under groupings. If i click on Group Row "A", value 1 will be passed to a stored procedure, and get data's with ID column = 1 and bind the Radgrid under A Group. in the same way for other groups too. Could u understand the problem what i mean. can u please give me sample? 