private void TreeItem_ProjectAdd_PreviewMouseLeftButtonDown(object sender, MouseButtonEventArgs e)
{
ProjectAddNew x = new ProjectAddNew();
UserPages.Children.Clear();
UserPages.Children.Add(x);
}
private void ButtonAddNewProject_Click(object sender, RoutedEventArgs e)
{
this.topgrid.Visibility = Visibility.Collapsed;
this.mainscrollviewer.Visibility = Visibility.Collapsed;
ProjectAddNew x = new ProjectAddNew();
UserPages.Children.Clear();
UserPages.Children.Add(x);
}