Add commas in thousands place for number in ASP.Net

Hi all, i am trying to get add commas in thousands places for a number in string format.

LblValue.Text = "Value: " + Mynumber.ToString("N0");
	LblValue.Text = "Value: " + String.Format("{0:#,###,###.##}", Mynumber);

by using above formats i will get following formats

209,483 209,489.62

but my requirement is i want to get following formats

2,09,483 2,09,489.62 if numbers are incresed then i want to get following formats

1,12,09,483 10,12,09,483 100,12,09,483 1,12,09,489.62 10,12,09,489.62 100,12,09,489.62 how to get it..

Thanks and regards