private static void TestValidationAllEntities() { using (var context = new InstituteEntities()) { //create entity var student = context.Students.Create(); student.StudentLastName = "Siddiqi"; student.GradePointAverage = 5; var department = context.Departments.Create(); department.DepartmentName = "Electrical Engineering"; //add it to context context.Students.Add(student); context.Departments.Add(department); //validate entity IEnumerable <DbEntityValidationResult> validationResults = context.GetValidationErrors(); string errorMessage = DbEntityValidationMessageParser.GetErrorMessage(validationResults); //Print Message Console.WriteLine(errorMessage); } }