Calling RadToolTipService.SetToolTipContent(element, message) generates unhandled exception:
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
at Telerik.Windows.Controls.RadToolTipService.GetToolTipObject(FrameworkElement rootVisual)
at Telerik.Windows.Controls.RadToolTipService.OnMouseLeaveElement(FrameworkElement element)
at Telerik.Windows.Controls.RadToolTipService.OnMouseLeaveElement(Object sender, MouseEventArgs e)
at Telerik.Windows.Controls.RadToolTipService.<RegisterTooltip>b__2(FrameworkElement instance, Object source, MouseEventArgs eventArgs)
at Telerik.Windows.WeakEventListener`3.OnEvent(TSource source, TEventArgs eventArgs)
at MS.Internal.CoreInvokeHandler.InvokeEventHandler(UInt32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName, UInt32 flags)
The element is a TextBox
at System.Collections.Generic.Dictionary`2.FindEntry(TKey key)
at System.Collections.Generic.Dictionary`2.TryGetValue(TKey key, TValue& value)
at Telerik.Windows.Controls.RadToolTipService.GetToolTipObject(FrameworkElement rootVisual)
at Telerik.Windows.Controls.RadToolTipService.OnMouseLeaveElement(FrameworkElement element)
at Telerik.Windows.Controls.RadToolTipService.OnMouseLeaveElement(Object sender, MouseEventArgs e)
at Telerik.Windows.Controls.RadToolTipService.<RegisterTooltip>b__2(FrameworkElement instance, Object source, MouseEventArgs eventArgs)
at Telerik.Windows.WeakEventListener`3.OnEvent(TSource source, TEventArgs eventArgs)
at MS.Internal.CoreInvokeHandler.InvokeEventHandler(UInt32 typeIndex, Delegate handlerDelegate, Object sender, Object args)
at MS.Internal.JoltHelper.FireEvent(IntPtr unmanagedObj, IntPtr unmanagedObjArgs, Int32 argsTypeIndex, Int32 actualArgsTypeIndex, String eventName, UInt32 flags)
The element is a TextBox