How to convert integer to binary string in C#?

Question

I\'m writing a number converter. How can I convert a integer to a binary string in C# WITHOUT using built-in functions (Convert.ToString does different things b

Answer 1

Here is an elegant solution:

// Convert Integer to binary and return as string
private static string GetBinaryString(Int32 n)
{
    char[] b = new char[sizeof(Int32) * 8];

    for (int i = 0; i < b.Length; i++)
        b[b.Length-1 - i] = ((n & (1 << i)) != 0) ? '1' : '0';

    return new string(b).TrimStart('0');
}