public async Task <IDataResult <Student> > GetStudentByIdAsync(int id)
{
var student = await _studentDal.GetAsync(s => s.Id == id);
if (student == null)
{
return(new ErrorDataResult <Student>(new Student {
Id = id
}, HttpStatusCode.NotFound));
}
return(new SuccessfulDataResult <Student>(student, HttpStatusCode.OK));
}