textbox1.text=decimal.parse(textbox1.text).Tostring("#,#");
textbox1.text=decimal.parse(textbox1.text).Tostring("C");
textbox1.text=decimal.parse(textbox1.text).ToString("0,0.0", CultureInfo.InvariantCulture);
Regex.Match(textbox1.Text,@"^[0-9]\d{2},[0-9]\d{3},[0-9]\d{3}$");
var
This content, along with any associated source code and files, is licensed under The Code Project Open License (CPOL)