Adler32 checksum: .NET implementation

adler32.cs

public class Adler32
    {
        public uint checksum = 1;

        /// <summary>Performs the hash algorithm on given data array.</summary>
        /// <param name="bytesArray">Input data.</param>
        /// <param name="byteStart">The position to begin reading from.</param>
        /// <param name="bytesToRead">How many bytes in the bytesArray to read.</param>
        public void ComputeHash(byte[] bytesArray, int byteStart, int bytesToRead)
        {
            int n;
            uint s1 = checksum & 0xFFFF;
            uint s2 = checksum >> 16;

            while (bytesToRead > 0)
            {
                n = (3800 > bytesToRead) ? bytesToRead : 3800;
                bytesToRead -= n;

                while (--n >= 0)
                {
                    s1 = s1 + (uint)(bytesArray[byteStart++] & 0xFF);
                    s2 = s2 + s1;
                }

                s1 %= 65521;
                s2 %= 65521;
            }

            checksum = (s2 << 16) | s1;
        }
    }