c# - How to pad a binary string with zeros?

Question

string binary = Convert.ToString(15, 2);

Console.WriteLine("{0}", binary);

Prints:

1111

I want it to print 00001000

Because the data type is of string and not integer I cannot do something like this:

Console.WriteLine("{0:00000000}", binary);

Answer 1

Console.WriteLine( binary.PadLeft(8, '0'));