protected void btnDeleteSelected_Click(object sender, EventArgs e)
        {
            foreach (GridViewRow row in UsersGridView.Rows)
            {
                CheckBox cb = (CheckBox)row.FindControl("chkRows");
                if (cb != null && cb.Checked)
                {
                    string         username = UsersGridView.DataKeys[row.RowIndex].Value.ToString();
                    MembershipUser u        = Membership.GetUser(username);
                    u.IsApproved = false;
                    Membership.UpdateUser(u);
                    SueetieUsers.DeactivateUser(username);

                    lblDeleteSuccess.Visible = true;
                }
            }
            Response.Redirect("RegisteredUsers.aspx");
        }