Hi Shashi,
Ensure that the CommandName property of the GridButtonColumn is set to "Delete".
Also, ensure that you have subscribed to the OnDeleteCommand as follows:
Place a debugger at the OnDeleteCommand event handler and press the button. The breakpoint is hit.
If the issue persists, consider sending us a sample project where the issue could be produced and we will debug it locally to check where does the problem stem from.
Kind regards,
Tsvetomir
Progress Telerik
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