void frm_RoleSelected(object sender, RoleSelectedArg e, Window window)
{
window.Close();
BizRole bizRole = new BizRole();
bizRole.AddUserToRole(e.Role.ID, selectedUser.ID);
var roleList = bizRole.GetRolesByUser(selectedUser.ID);
dtgRolesByUser.ItemsSource = roleList;
}
void frm_UserSelected(object sender, UserSelectedArg e, Window window)
{
window.Close();
BizRole bizRole = new BizRole();
bizRole.AddUserToRole(selectedRole.ID, e.User.ID);
BizUser bizUser = new BizUser();
List <UserDTO> userList = bizUser.GetUserByRole(selectedRole.ID);
dtgUsersByRole.ItemsSource = userList;
}