private static void Load()
 {
     if (SystemIOFile.Exists(FileName))
     {
         var streamFile = new FileStream(FileName, FileMode.OpenOrCreate);
         _constantsViewer = (ConstantsViewer)XmlConstantsViewer.Deserialize(streamFile);
         streamFile.Close();
     }
 }
        private static ConstantsViewer Create()
        {
            var result = new ConstantsViewer
            {
                OverlayDrawDistance  = 30.0,
                AddressLanguageCode  = "nl",
                AddressDatabase      = "CMDatabase",
                CrossCheckSize       = 10.0,
                MeasurementPointSize = 5.0,
                MeasurementFontSize  = 8.0f,
            };

            result.Save();
            return(result);
        }