private void button_Inquriy_Click(object sender, EventArgs e)  {      if (textBox_Inquiry.TextLength > 0)      {          String strInquiry = textBox_Inquiry.Text;          byte[] bytes = Encoding.GetEncoding("GB2312").GetBytes(strInquiry);          String strResult = String.Empty;          foreach (byte b in bytes)          {              strResult += b.ToString("X2");              strResult += " ";          }          textBox_Result.Text = strResult;      }      else      {          MessageBox.Show("请输入待查询的字符");      }  }