why button_click event raising 2 times?

[C# Programming]

Hi all,
in my C#.net 3.5 windows application, i have a insert statement in my button_Click event.
but this is raising 2 times, so 2 rows with same data inserting instead of 1.
i checked in debugmode after reaching last statement it is moving to first statement again.
why this is happening?

Please give some solution

Thanks in Advance
--Naren
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