/// <summary>
 /// On 'Currency' combobox selected valuechanged
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void cmbCurrency_SelectedValueChanged(object sender, EventArgs e)
 {
     try
     {
         CurrencyBll BllCurrency = new CurrencyBll();
         String      strSymbol   = BllCurrency.GetDefaultCurrencySymbol();
         pnlExchange.Visible = true;
         lblSymbol.Text      = "1" + cmbCurrency.Text;
         lblRate.Text        = txtExchangeRate.Text + strSymbol;
     }
     catch (Exception)
     {
         throw;
     }
 }
 /// <summary>
 /// On 'ExchangeRate' textbox textchanged
 /// </summary>
 /// <param name="sender"></param>
 /// <param name="e"></param>
 private void txtExchangeRate_TextChanged(object sender, EventArgs e)
 {
     try
     {
         CurrencyBll BllCurrency = new CurrencyBll();
         String      strSymbol   = BllCurrency.GetDefaultCurrencySymbol();
         pnlExchange.Visible = true;
         lblSymbol.Text      = "1" + cmbCurrency.Text;
         lblRate.Text        = txtExchangeRate.Text + strSymbol;
     }
     catch (Exception ex)
     {
         MessageBox.Show("ER23:" + ex.Message, "OpenMiracle", MessageBoxButtons.OK, MessageBoxIcon.Information);
     }
 }