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's mine: (The upper part convert 32-char binary string to 32-bit integer, the lower part convert 32-bit integer back to 32-char binary string). Hope this helps.

        string binaryString = "011100100111001001110011";
        int G = 0;

        for (int i = 0; i < binaryString.Length; i++)
            G += (int)((binaryString[binaryString.Length - (i + 1)] & 1) << (i % 32));

        Console.WriteLine(G); //‭7500403‬
        binaryString = string.Empty;

        for (int i = 31; i >= 0; i--)
        {
            binaryString += (char)(((G & (1 << (i % 32))) >> (i % 32)) | 48);
        }

        Console.WriteLine(binaryString); //00000000011100100111001001110011