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When I use the following code in my treelist view to generate group summay
<telerik:RadTreeListView.GroupDescriptors> <telerik:GroupDescriptor Member="Country"> <telerik:GroupDescriptor.AggregateFunctions> <telerik:CountFunction Caption="Total Country:" /> </telerik:GroupDescriptor.AggregateFunctions> </telerik:GroupDescriptor> </telerik:RadTreeListView.GroupDescriptors>I get the following error
Line: 56
Error: Unhandled Error in Silverlight Application
Code: 4004
Category: ManagedRuntimeError
Message: System.Collections.Generic.KeyNotFoundException: The given key was not present in the dictionary.
at System.ThrowHelper.ThrowKeyNotFoundException()
at System.Collections.Generic.Dictionary`2.get_Item(TKey key)
at System.Windows.ResourceManagerWrapper.GetResourceForUri(Uri xamlUri, Type componentType)
If I remove the group descriptor there is not error and the data bound properly.