bytesToBase64

Base64 encoder from scratch in C#. No Convert.ToBase64String — manual bit manipulation.

Algorithm

1. Group every 3 bytes (24 bits)
2. Split into four 6-bit segments
3. Map each 6-bit value to Base64 alphabet (A-Z, a-z, 0-9, /, +)

Input length must be multiple of 3. Padding (=) not implemented.

Usage

byte[] data = new byte[] { 72, 101, 108 }; // "Hel"
string encoded = Base64.Encode(data);
Console.WriteLine(encoded); // "SGVs"

API

Method	Description
Base64.Encode(byte[] source)	Encode byte array to Base64 string