This forum concerns Telerik UI for WinForms, while judging by your code, it seems you are using some other technology. I would suggest that you address your question to the appropriate forum in order to get adequate response. The list of the forums is available here: http://www.telerik.com/forums
If you have having troubles finding the right forum for you, just let me know which product you are using and I will help you find it.
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