Format string to a 3 digit number

Question

Instead of doing this, I want to make use of string.format() to accomplish the same result:

if (myString.Length < 3)
{
    myString =  \"00\"         


        

Answer 1

 string.Format("{0:000}", myString);

Answer 2

It's called Padding:

myString.PadLeft(3, '0')

Answer 3

You can also do : string.Format("{0:D3}, 3);