Format double type with minimum number of decimal digits

Question

I need to format double type so that it has minimum two decimal digits but without limitation for maximum number of decimal digits:

5     -> \"5.00\"
5.5          


        

Answer 1

You can use the 0 format specificer for non-optional digits, and # for optional digits:

n.ToString("0.00###")

This example gives you up to five decimal digits, you can add more # positions as needed.