public tblPatient GetPatientBLK(string blk) { try { using (MedicalInstitutionNedeljniEntities context = new MedicalInstitutionNedeljniEntities()) { tblPatient user = (from e in context.tblPatients where e.BLK.Equals(blk) select e).First(); return user; } } catch (Exception ex) { System.Diagnostics.Debug.WriteLine("Exception" + ex.Message.ToString()); return null; } }