private void btnDelete_Click(object sender, EventArgs e)
        {
            DialogResult res = MessageBox.Show("Are you sure you want to Delete User", "Confirmation", MessageBoxButtons.OK, MessageBoxIcon.Information);

            if (res == DialogResult.OK && balUser.DeleteUser(txtUserId.Text))
            {
                MessageBox.Show("Deleted Successfully", "Updated", MessageBoxButtons.OK, MessageBoxIcon.Information);
                LoadGrid();
                LoadCbo();
            }
            else
            {
                MessageBox.Show("Deleted Operation Failure", "Failure", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }