/// HasColor
        #region HasColor

        /// <summary>
        /// Indicates whether specified file has color or not. Has to be supported file (ps or pdf)
        /// </summary>
        /// <param name="fileName">file name</param>
        /// <returns>true if has color; otherwise false</returns>
        public static bool?HasColor(string fileName)
        {
            if (String.IsNullOrWhiteSpace(fileName))
            {
                return(null);
            }

            try
            {
                if (!File.Exists(fileName))
                {
                    return(null);
                }

                SupportedPrintFormat format = GetFileFormat(fileName);
                if (format == SupportedPrintFormat.PDF)
                {
                    return(GhostScriptHelper.HasColor(fileName));
                }
                else if (format == SupportedPrintFormat.PS)
                {
                    return(PostScriptHelper.HasColor(fileName));
                }
            }
            catch (Exception ex)
            {
                WPFNotifier.Error(ex);
            }

            return(null);
        }
        /// GetFileFormat
        #region GetFileFormat

        /// <summary>
        ///
        /// </summary>
        /// <param name="fileName"></param>
        /// <returns></returns>
        public static SupportedPrintFormat GetFileFormat(string fileName)
        {
            if (String.IsNullOrWhiteSpace(fileName))
            {
                return(SupportedPrintFormat.None);
            }

            try
            {
                if (!File.Exists(fileName))
                {
                    return(SupportedPrintFormat.None);
                }
            }
            catch
            {
                return(SupportedPrintFormat.None);
            }

            if (PDFHelper.IsPDF(fileName))
            {
                return(SupportedPrintFormat.PDF);
            }

            if (PostScriptHelper.IsPS(fileName))
            {
                return(SupportedPrintFormat.PS);
            }

            return(SupportedPrintFormat.Unknown);
        }