private void btnSaveEdit_Click(object sender, EventArgs e)
 {
     if (txtHoTen.Text == "")
     {
         MessageBox.Show("Please fill in all the information!");
     }
     else
     {
         if (CheckValidName(txtHoTen.Text))
         {
             string gender = "";
             if (rbNam.Checked == true && rbNu.Checked == false)
             {
                 gender = "Nam";
             }
             else if (rbNam.Checked == false && rbNu.Checked == true)
             {
                 gender = "Nữ";
             }
             else
             {
                 gender = "Bê đê";
             }
             string TK = ManageSystem.TK();
             int    ID = ManageSystem.GetUserID(TK);
             ManageSystem.AddInfoPersonal(ID, dtpNgaySinh.Value.ToString("dd/MM/yyyy"), txtHoTen.Text, gender);
             MessageBox.Show("Save Succes!");
             pnlEdit.Visible            = false;
             pnlEdit.Enabled            = false;
             pnlPersonalDetails.Visible = true;
             pnlPersonalDetails.Enabled = true;
             pnlSavePass.Visible        = false;
             pnlSavePass.Enabled        = false;
             Update();
         }
         else
         {
             MessageBox.Show("Name has invalid character and number!");
         }
         ClearTextbox();
     }
 }