private void buttonMD5Sure_Click(object sender, EventArgs e)
        {
            this.textBoxMD5Str.Text = string.Empty;
            bool fsChecked  = false;
            bool strChecked = false;

            switch (comboBoxMD5.SelectedItem.ToString())
            {
            case "文件":
                fsChecked = true;
                break;

            default:
                strChecked = true;
                break;
            }

            if (strChecked)
            {
                string change = this.textBoxFileStr.Text.Trim();

                if (!string.IsNullOrEmpty(change))
                {
                    this.textBoxMD5Str.Text = MD5Utils.GetMD5String(change);
                }
                else
                {
                    MessageBox.Show("Exchange Text can't null or empty.", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            else if (fsChecked)
            {
                string m_MD5SelectFilePath = this.textBoxFilePath.Text;
                if (File.Exists(m_MD5SelectFilePath))
                {
                    if (m_MD5ExchargeThread == null || m_MD5ExchargeThread.ThreadState != ThreadState.Running)
                    {
                        m_MD5ExchargeThread = null;
                        m_MD5ExchargeThread = new Thread(() =>
                        {
                            using (FileStream fsStream = new FileStream(m_MD5SelectFilePath, FileMode.Open, FileAccess.Read))
                            {
                                long length   = fsStream.Length;
                                byte[] bs     = new byte[length];
                                int r         = fsStream.Read(bs, 0, bs.Length);
                                string md5Str = MD5Utils.GetMD5String(bs);
                                if (!string.IsNullOrEmpty(md5Str))
                                {
                                    this.textBoxMD5Str.Text = md5Str;
                                }
                                else
                                {
                                    MessageBox.Show("Exchange File String is null.", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                                }
                            }
                        });
                        m_MD5ExchargeThread.SetApartmentState(ApartmentState.STA);
                        m_MD5ExchargeThread.Start();
                    }
                }
                else
                {
                    MessageBox.Show("Exchange MD5 Select File not exist.", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
                }
            }
            else
            {
                MessageBox.Show("Exchange Check Box don't select.", "错误", MessageBoxButtons.OK, MessageBoxIcon.Error);
            }
        }