public static void UpdateOnlyDepartmentNoTracking()
{
List <Subject> subjectsWithDepartment = context.Subjects.Include(s => s.Department).ToList();
using StudentsContext newcontext = new StudentsContext();
Subject s = subjectsWithDepartment[0];
s.Department.Name = "Department Update No Tracking";
newcontext.Attach(s);
newcontext.Entry(s.Department).State = EntityState.Modified;
newcontext.SaveChanges();
}