void SetActiveWorkspace(WorkspaceViewModel workspace)
        {
            System.Diagnostics.Debug.Assert(this.Workspaces.Contains(workspace));

            ICollectionView collectionView = CollectionViewSource.GetDefaultView(this.Workspaces);
            if (collectionView != null)
                collectionView.MoveCurrentTo(workspace);

            SelectedWorkspace = workspace;
        }
 void ShowWorkspace()
 {
     var workspaceVm = new WorkspaceViewModel(AuthKey);
     this.SetActiveView(workspaceVm);
 }