(12345.67).toFixed(2).replace(/\d(?=(\d{3})+\.)/g, ‘$&,’); // 12,345.67

decimal value = 0.00M;<br /><br /><br /> value = Convert.ToDecimal(12345.12345);<br /><br /><br /> Console.WriteLine(value.ToString(“C”));<br /><br /><br /> //OutPut : $12345.12<br /><br /><br /> Console.WriteLine(value.ToString(“C1”));<br /><br /><br /> //OutPut : $12345.1<br /><br /><br /> Console.WriteLine(value.ToString(“C2”));<br /><br /><br /> //OutPut : $12345.12<br /><br /><br /> Console.WriteLine(value.ToString(“C3”));<br /><br /><br /> //OutPut : $12345.123<br /><br /><br /> Console.WriteLine(value.ToString(“C4”));<br /><br /><br /> //OutPut : $12345.1234<br /><br /><br /> Console.WriteLine(value.ToString(“C5”));<br /><br /><br /> //OutPut : $12345.12345<br /><br /><br /> Console.WriteLine(value.ToString(“C6”));<br /><br /><br /> //OutPut : $12345.123450