Revit二次开发闪存

速记一些小知识点。
常用代码段

[Transaction(TransactionMode.Automatic)]
[Regeneration(RegenerationOption.Automatic)]
public class HelloWorld : IExternalCommand
{
    public Result Execute(ExternalCommandData commandData, ref string message, ElementSet elements)
    {
        UIApplication uiApp = commandData.Application;
        Document doc = uiApp.ActiveUIDocument.Document;
        Selection sel = uiApp.ActiveUIDocument.Selection;
    }
}

end