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Job Resume TemplateFirst i run the database from SQL Management studio , Then i changed the web configuration code to <add name="examMaha" connectionString="Data Source=.SQLEXPRESS;AttachDbFilename=|DataDirectory|examMaha.mdf;Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient"/> when i run and Enter the Admin ID = and password = 123456 i get the below error System.TypeInitializationException: 'The type initializer for 'DAL.DBCommon' threw an exception.' Inner exception NullReferenceException: Object reference not set to an instance of an object. any suggestion please ?