How to resolve this Error

providerName="Sql.Client.Data" />

 

 

 

 

onnection Timeout Expired. The timeout period elapsed while attempting to consume the pre-login handshake acknowledgement. This could be because the pre-login handshake failed or the server was unable to respond back in time. The duration spent while attempting to connect to this server was - [Pre-Login] initialization=42037; handshake=3; 

 

 I am  Created Windows Application , when i run application it shows me this Error ,

 

I did all the  things like ,,, enable tcp , creating inbound rule , etc