How to display the negative symbol in starting of cell value when RTL mode is enabled in WinForms GridControl?

this.gridControl1.DrawCellDisplayText += new GridDrawCellDisplayTextEventHandler(gridControl1_DrawCellDisplayText);
 
void gridControl1_DrawCellDisplayText(object sender, GridDrawCellDisplayTextEventArgs e)
{
   if (e.DisplayText.IndexOf('-') != -1 && e.DisplayText.IndexOf('-') == 0)
   {
      string sample = e.DisplayText.Substring(e.DisplayText.IndexOf('-') + 1,  e.DisplayText.Length - 1);
      e.DisplayText = sample + '-';
   }
}

AddHandler gridControl1.DrawCellDisplayText, AddressOf gridControl1_DrawCellDisplayText
Private Sub gridControl1_DrawCellDisplayText(ByVal sender As Object, ByVal e As GridDrawCellDisplayTextEventArgs)
   If e.DisplayText.IndexOf("-"c) <> -1 AndAlso e.DisplayText.IndexOf("-"c) = 0 Then
       Dim sample As String = e.DisplayText.Substring(e.DisplayText.IndexOf("-"c) + 1,  e.DisplayText.Length - 1)
       e.DisplayText = sample & "-"c
   End If
End Sub

void gridControl1_DrawCellDisplayText(object sender, GridDrawCellDisplayTextEventArgs e)
{
   e.Style.RightToLeft = System.Windows.Forms.RightToLeft.No;
}

Private Sub gridControl1_DrawCellDisplayText(ByVal sender As Object, ByVal e As GridDrawCellDisplayTextEventArgs)
   e.Style.RightToLeft = System.Windows.Forms.RightToLeft.No;
End Sub