private void Window_Loaded(object sender, RoutedEventArgs e)
{
DataContext = _commandService;
GanttControl.DataContext = new GanttViewModel(_workspace);
UpdateTaskGridColumns();
TaskDataGrid.DataContext = new TaskGridViewModel(_workspace);
UpdateResourceGridColumns();
ResourceDataGrid.DataContext = new ResourceGridViewModel(_workspace);
UpdateAssignmentGridColumns();
AssignmentDataGrid.DataContext = new AssignmentGridViewModel(_workspace);
_workspace.ApplyChanges(CreateProject());
_undoRedoService.Reset();
}