FastColoredTextBoxNS.EncodingDetector.DetectBOMBytes C# (CSharp) Method

        public static Encoding DetectBOMBytes(byte[] BOMBytes)
        {
            if (BOMBytes.Length < 2)
                return null;

            if (BOMBytes[0] == 0xff
                && BOMBytes[1] == 0xfe
                && (BOMBytes.Length < 4
                    || BOMBytes[2] != 0
                    || BOMBytes[3] != 0
                    )
                )
                return Encoding.Unicode;

            if (BOMBytes[0] == 0xfe
                && BOMBytes[1] == 0xff
                )
                return Encoding.BigEndianUnicode;

            if (BOMBytes.Length < 3)
                return null;

            if (BOMBytes[0] == 0xef && BOMBytes[1] == 0xbb && BOMBytes[2] == 0xbf)
                return Encoding.UTF8;

            if (BOMBytes[0] == 0x2b && BOMBytes[1] == 0x2f && BOMBytes[2] == 0x76)
                return Encoding.UTF7;

            if (BOMBytes.Length < 4)
                return null;

            if (BOMBytes[0] == 0xff && BOMBytes[1] == 0xfe && BOMBytes[2] == 0 && BOMBytes[3] == 0)
                return Encoding.UTF32;

            if (BOMBytes[0] == 0 && BOMBytes[1] == 0 && BOMBytes[2] == 0xfe && BOMBytes[3] == 0xff)
                return Encoding.GetEncoding(12001);

            return null;
        }