public IVoidResult RemoveStudent(Student student)
{
var result = new VoidResult();
if (!Students.Contains(student))
{
return(result.AddErrorMessage(string.Format("{0}'s students collection does not contain this student ({1})", Name, student.FullName)));
}
if (student.Courses == null || !student.Courses.Contains(this))
{
return(result.AddErrorMessage(string.Format("{0}'s courses collection does not contain this course ({1})", student.FullName, Name)));
}
Students.Remove(student);
student.Courses.Remove(this);
return(result);
}
public IVoidResult AddStudent(Student student)
{
var result = new VoidResult();
if (Students.Any(s => s.SurName.Equals(student.SurName, StringComparison.InvariantCultureIgnoreCase)))
{
return(result.AddErrorMessage("Another student with this surname already exists in this course"));
}
Students.Add(student);
if (student.Courses == null)
{
student.Courses = new Collection <Course>();
}
student.Courses.Add(this);
return(result);
}