System.VarintBitConverter.ToTarget C# (CSharp) Method

        private static ulong ToTarget(byte[] bytes, int sizeBites)
        {
            int shift = 0;
            ulong result = 0;

            foreach (ulong byteValue in bytes)
            {
                ulong tmp = byteValue & 0x7f;
                result |= tmp << shift;

                if (shift > sizeBites)
                {
                    throw new ArgumentOutOfRangeException("bytes", "Byte array is too large.");
                }

                if ((byteValue & 0x80) != 0x80)
                {
                    return result;
                }

                shift += 7;
            }

            throw new ArgumentException("Cannot decode varint from byte array.", "bytes");
        }