public override string ToString()
{
string res;
res = "";
if (Employee != null)
res = res+ Employee.ToString();
if (this.PlanStaff.Post != null)
res = res + ", " + this.PlanStaff.Post.ToString();
if (this.WorkType != null)
res = res + ", " + this.WorkType.ToString();
res = res + ", " + StaffCount.ToString() + " ставки";
return res;
}