System.Data.SqlClient.SqlException: Cannot open database "Northwind" requested by the login. The login failed. Login failed for user 'IIS APPPOOL\DefaultAppPool'.
System.Data.SqlClient.SqlException: Cannot open database "Northwind" requested by the login. The login failed. Login failed for user 'IIS APPPOOL\DefaultAppPool'. In this quick post you will learn how to fix this issue. Today in the morning when I was executing one of my web applications I fall in titled error and the same I’m sharing, that how I fixed this.