C#文件加密方法汇总

        private void btnEncryptDir_Click(object sender, EventArgs e)
        {
            #region 验证
            if (txtPwd.Text == "")
            {
                MessageBox.Show("密码不能为空", "提示");
                return;
            }

            if (txtPwdCfm.Text == "")
            {
                MessageBox.Show("确认密码不能为空", "提示");
                return;
            }

            if (txtPwdCfm.Text != txtPwd.Text)
            {
                MessageBox.Show("两次输入的密码不相同", "提示");
                return;
            }
            #endregion

            if (folderBrowserDialog1.ShowDialog() == DialogResult.OK)
            {
                if (MessageBox.Show(string.Format("确定加密文件夹{0}？", folderBrowserDialog1.SelectedPath),
                    "提示", MessageBoxButtons.OKCancel) == DialogResult.Cancel)
                {
                    return;
                }