public static CityDocument Open(string fileName)
{
CityDocument doc = new CityDocument();
doc.FileName = fileName;
doc.HasFile = true;
doc.Content = CityDistrict.LoadCml(fileName);
doc.Snapshot();
return(doc);
}
public static CityDocument New()
{
CityDocument doc = new CityDocument();
doc.FileName = string.Empty;
doc.HasFile = false;
doc.Content = new CityDistrict();
doc.Snapshot();
return(doc);
}
