public void GetAllDepartment()
 {
     DepartmentDropDownList.DataSource     = _EnrollCourseManager.GetAllDepartment();
     DepartmentDropDownList.DataTextField  = "DeptCode";
     DepartmentDropDownList.DataValueField = "Id";
     DepartmentDropDownList.DataBind();
     DepartmentDropDownList.Items.Insert(0, new ListItem("Select Department", "0"));
 }