Kindly help for this exception which occuring at time of statement
DataServiceQuery
<Customers> query = asyncResult.AsyncState as DataServiceQuery<Customers>;
IEnumerable<Customers> list = query.EndExecute(asyncResult).ToList();
RadGridView1.ItemsSource = list;
in
EndExecute(IAsyncResult asyncResult) method......
below is whole stack trace of exception....
{System.TypeLoadException: Could not load type 'System.ComponentModel.GroupDescription' from assembly 'System.Windows.Controls.Data, Version=2.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'.
at Telerik.Windows.Data.RecordManager.Initialize(TableDefinition newTableDefinition, Record masterRecord)
at Telerik.Windows.Data.RecordManager..ctor(TableDefinition tableDefinition, Record masterRecord)
at Telerik.Windows.Controls.DataControl.get_RecordManager()
at Telerik.Windows.Controls.GridView.GridViewDataControl.get_FilterDescription()
at Telerik.Windows.Controls.GridView.GridViewDataControl.InitializeFiltering()
at Telerik.Windows.Controls.GridView.GridViewDataControl.<OnItemsSourceChanged>b__7(Object sender, EventArgs e)
at Telerik.Windows.Controls.CursorManager`1.PerformTimeConsumingOperation(FrameworkElement frameworkElement, EventHandler`1 eventHandler, Object sender, EventArgs e)
at Telerik.Windows.Controls.GridView.GridViewDataControl.OnItemsSourceChanged()
at Telerik.Windows.Controls.DataControl.OnItemsSourcePropertyChanged(DependencyObject origin, DependencyPropertyChangedEventArgs args)
at Telerik.Windows.PropertyMetadata.<>c__DisplayClass1.<Create>b__0(DependencyObject d, DependencyPropertyChangedEventArgs e)
at System.Windows.DependencyObject.RaisePropertyChangeNotifications(DependencyProperty dp, Object newValue, Object oldValue)
at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value, Boolean allowReadOnlySet, Boolean isSetByStyle, Boolean isSetByBuiltInStyle, PropertyInvalidationReason reason)
at System.Windows.DependencyObject.SetValueInternal(DependencyProperty dp, Object value)
at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
at Telerik.Windows.Controls.DataControl.set_ItemsSource(Object value)
at SilverlightGridServerPagingSortingAndFiltering.Page.EndExecute(IAsyncResult asyncResult)
at System.Data.Services.Client.BaseAsyncResult.HandleCompleted()
at System.Data.Services.Client.QueryAsyncResult.AsyncEndRead(IAsyncResult asyncResult)
at System.IO.Stream.BeginRead(Byte[] buffer, Int32 offset, Int32 count, AsyncCallback callback, Object state)
at System.Data.Services.Client.QueryAsyncResult.AsyncEndGetResponse(IAsyncResult asyncResult)}