string - Format a double value like currency but without the currency sign (C#) -

I have a text box with a string value feed that shows me a balance that needs to be formatted as follows: / P>

  ###, ###, ###, ###

I can use the price. Toastring ("c"), but it will put currency sign in.

Any idea that I will manipulate the string before feeding the text box to achieve the given formatting?

I tried, without success:

  string.format ("###, ###, ###, ## 0.00", Current Balance) ;

Many thanks,

  for display = currentBalance .ToString ("N2");

Dos2Unix