Hi,

 Thanks. Yes it's working perfectly in mixed mode authentication, but i need it to run in windows authentication mode.

my connection string is as below

  <add key="OnlineExamEntities" value="Data Source=.\SQLEXPRESS;Initial Catalog=OnlineExam;Integrated Security=SSPI;Trusted_Connection=Yes;" />

or is there any query where i can directly convert windows authentication mode to mixed mode authentication? Because client don't want management studio.