public DocumentVM Open(string filepath)
{
var fileViewModel = _files.FirstOrDefault(fm => fm.FilePath == filepath);
if (fileViewModel != null)
{
return(fileViewModel);
}
fileViewModel = new DocumentVM(filepath);
_files.Add(fileViewModel);
RecentFiles.AddNewEntryIntoMRU(filepath);
RaisePropertyChanged("RecentFiles");
return(fileViewModel);
}