/// <summary>
        /// Rerurns up to maxEncodings codpages that are assumed to be apropriate
        /// </summary>
        /// <param name="input">array containing the raw data</param>
        /// <param name="maxEncodings">maxiumum number of encodings to detect</param>
        /// <returns>an array of Encoding with assumed encodings</returns>
        public static Encoding[] DetectInputCodepages(byte[] input, int maxEncodings)
        {
            if (maxEncodings < 1)
                throw new ArgumentOutOfRangeException("maxEncodings", "at least one encoding must be returned");

            if (input == null)
                throw new ArgumentNullException("input");

            // empty strings can always be encoded as ASCII
            if (input.Length == 0)
                return new Encoding[] { Encoding.ASCII };

            // expand the string to be at least 256 bytes
            if (input.Length < 256)
            {
                byte[] newInput = new byte[256];
                int steps = 256 / input.Length;
                for (int i = 0; i < steps; i++)
                    Array.Copy(input, 0, newInput, input.Length * i, input.Length);

                int rest = 256 % input.Length;
                if (rest > 0)
                    Array.Copy(input, 0, newInput, steps * input.Length, rest);
                input = newInput;
            }

            List<Encoding> result = new List<Encoding>();

            // get the IMultiLanguage" interface
            IMultiLanguage2 multilang2 = new CMultiLanguageClass();
            if (multilang2 == null)
                throw new COMException("Failed to get IMultilang2");
            try
            {
                DetectEncodingInfo[] detectedEncdings = new DetectEncodingInfo[maxEncodings];

                int scores = detectedEncdings.Length;
                int srcLen = input.Length;

                // setup options (none)
                const MLDETECTCP options = MLDETECTCP.MLDETECTCP_NONE;

                // finally... call to DetectInputCodepage
                multilang2.DetectInputCodepage(options, 0,
                    ref input[0], ref srcLen, ref detectedEncdings[0], ref scores);

                // get result
                if (scores > 0)
                {
                    for (int i = 0; i < scores; i++)
                    {
                        // add the result
                        result.Add(Encoding.GetEncoding((int)detectedEncdings[i].nCodePage));
                    }
                }
            }
            finally
            {
                Marshal.FinalReleaseComObject(multilang2);
            }
            // nothing found
            return result.ToArray();
        }
 public virtual extern void DetectInputCodepage([In] MLDETECTCP flags, [In] uint dwPrefWinCodePage,
                                                [In] ref byte pSrcStr, [In, Out] ref int pcSrcSize,
                                                [In, Out] ref DetectEncodingInfo lpEncoding,
                                                [In, Out] ref int pnScores);
 public virtual extern void IMultiLanguage3DetectInputCodepage([In] uint dwFlag, [In] uint dwPrefWinCodePage, [In] ref sbyte pSrcStr, [In, Out] ref int pcSrcSize, [In, Out] ref DetectEncodingInfo lpEncoding, [In, Out] ref int pnScores);
 public virtual extern void DetectCodepageInIStream([In] MLDETECTCP flags,
                                                    [In] uint dwPrefWinCodePage,
                                                    [In, MarshalAs(UnmanagedType.Interface)] IStream pstmIn,
                                                    [In, Out] ref DetectEncodingInfo lpEncoding,
                                                    [In, Out] ref int pnScores);
 public virtual extern void IMultiLanguage3DetectCodepageInIStream([In] uint dwFlag, [In] uint dwPrefWinCodePage, [In, MarshalAs(UnmanagedType.Interface)] IStream pstmIn, [In, Out] ref DetectEncodingInfo lpEncoding, [In, Out] ref int pnScores);