internal void AddUsedFile(UseFileInfo usefileinfo)
        {
            var lst = GetMRUFileList();

            lst.RemoveAll( ufi => ufi.PathFile == usefileinfo.PathFile);    //  Remove any that already exists.
            lst.Add(usefileinfo);
            MRUFileList = Helpers.ToXml(lst, typeof(List<UseFileInfo>));
            Save();
        }
 internal static UseFileInfo Create(string pathfile, DateTime timeOfOpening)
 {
     var ret = new UseFileInfo();
     ret.Set(pathfile, timeOfOpening);
     return ret;
 }