Startup="Application_Startup"

private void Application_Startup(object sender, StartupEventArgs e)
{
SplashScreen.Show<SplashScreen>();
AppDomain.CurrentDomain.AssemblyLoad += CurrentDomain_AssemblyLoad;
}

void CurrentDomain_AssemblyLoad(object sender, AssemblyLoadEventArgs args)
{
    SplashScreen.CallSplashScreenMethod<SplashScreen>(x => x.Text(args.LoadedAssembly.GetName().Name));
}