Question

How to convert an integer number into its binary representation?

I’m using this code:

String input = "8";
String output = Convert.ToInt32(input, 2).ToString();

But it throws an exception:

Could not find any parsable digits

Answer 1

Your example has an integer expressed as a string. Let’s say your integer was actually an integer, and you want to take the integer and convert it to a binary string.

int value = 8;
string binary = Convert.ToString(value, 2);

Which returns 1000.