not to be close while use error provider

well..i know sir,i did it same.but i mean while after 'eror provider avtive' ..how to close through exit?suppose i wont given to textbox,at that time which error provider active....then how to close?

how to write code for 'sms alert' in the same way of way2sms....in c# windows application vs 2008 in sql 2005,in this i tried to add smsclient.dll to reference through add reference.but not add up..getting error.but i can add to vs2010...why i can't?the form like to as mobile number,message

Hi!
try to use CausesValidation="false" on exit button...

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