Convert Enum to String with two digit

Question

I have a question here in converting an enum to a string, but I need the conversion to be filled with zero 2 digit. example

public enum System { Unknown = 0, Mirror = 3, Order = 17 }

the output would be this "03".

with example below it works

int value; value = 3; Console.WriteLine(value.ToString("D2")); // Displays 03

but with enum does not work

Console.WriteLine(SourceSystem.Mirror.ToString("D2"));

and this error appears

System.FormatException Message=Format String can be only "G", "g", "X", "x", "F", "f", "D" or "d".....

Cast to int? int value = (int)System.Mirror; Console.WriteLine(value.ToString("D2")) — Arash Motamedi
– Arash Motamedi, Commented Jun 25, 2019 at 21:51
cast your enum.value to int: ((int) System.Mirror).ToString("D2") — Imbar M.
– Imbar M., Commented Jun 25, 2019 at 21:51

Chris Gong · Accepted Answer · 2019-06-25 21:53:55Z

System.Mirror is currently of type enum, so that's why you can't call ToString("D2") on it since you need to call this method on a variable of type int. So what you should do is first cast the enum to type int and then call ToString("D2") on that casted variable like so,

Console.WriteLine(((int) System.Mirror).ToString("D2"));

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