public bool ScheduleLessonPractiseToPractitionerInCourse(Practitioner prac, Course c, Lesson les)
{
if (SettingDatabase.PractitionerHasMoreThenAllowsHours(prac, les))
{
MessageBox.Show("Can't register any more lessons to this Practitioner, because he above more then 16 weekly hours teaching");
return(false);
}
return(SettingDatabase.AddPractiseInCourseToPractitioner(prac, c, les));
}