7_密码显示与隐藏

        private void checkBox_password_CheckedChanged(object sender, EventArgs e)
        {
           textBox_password.PasswordChar = '\0';
            if (checkBox_password.Checked)
            {
                textBox_password.PasswordChar = '\0';
            }
            else
            {
                textBox_password.PasswordChar = '*';
            }
        }