Yunan.WPF.ImageAnim.GifAnimation.ParseExtensionBlock C# (CSharp) Method

        private int ParseExtensionBlock(byte[] gifData, int offset)
        {
            int returnOffset = offset;
            // Extension Block
            int length = gifData[offset + 2];
            returnOffset = offset + length + 2 + 1;
            // check if netscape continousLoop extension
            if (gifData[offset + 1] == 0xFF && length > 10)
            {
                string netscape = System.Text.ASCIIEncoding.ASCII.GetString(gifData, offset + 3, 8);
                if (netscape == "NETSCAPE")
                {
                    _numberOfLoops = BitConverter.ToUInt16(gifData, offset + 16);
                    if (_numberOfLoops > 0)
                    {
                        _numberOfLoops++;
                    }
                }
            }
            while (gifData[returnOffset] != 0x00)
            {
                returnOffset = returnOffset + gifData[returnOffset] + 1;
            }

            returnOffset++;

            return returnOffset;
        }