public MainViewModel()
{
rootTreeItem1 = new TreeItem();
rootTreeItem2 = new TreeItem();
// Pfad bei Bedarf anpassen
var path = Directory.GetParent(Environment.CurrentDirectory).Parent.Parent.Parent.FullName;
FillTree(Tree1, path, 0);
FillTree(Tree2, path, 0);
ExpandAllCommand = new ActionCommand(() => Tree1.ExpandOrCollapseAll(true));
CollapseAllCommand = new ActionCommand(() => Tree1.ExpandOrCollapseAll(false));
OpenAppXamlCommand = new ActionCommand(OpenAppXaml);
DragDropControllerTV1 = new DragDropController()
{
CanDrag = CanDragTV1, CanDrop = CanDropTV1, Drop = DropTV1
};
}