Your GetEmailSetupList returns generic list of LSM.DAL.EmailSetup.
But you are assigning to generic list of LSM.Admin.EmailSetup
So change the LSM.Admin.EmailSetup to LSM.DAL.EmailSetup.
BALEmailSetup objEmailSetup = new BALEmailSetup();
List<LSM.DAL.EmailSetup> Result = objEmailSetup.GetEmailSetupList();