private void OnStartup(object sender, StartupEventArgs e)
{
// Setup MEF.
Network.DownloadCatalog = new AggregateCatalog();
CompositionHost.Initialize(new DeploymentCatalog(), Network.DownloadCatalog);
// Load the view.
var rootView = new RootViewModel().CreateView();
RootVisual = rootView;
// Process any instructions in the query-string.
var queryString = new QueryString();
queryString.StartTestRun();
}