message: Removed duplicate includes (win)
diff: using System.Collections.Generic;
  using System.Linq;
  using System.Text;
  +using System.Threading;
  using System.Threading.Tasks;
  using System.Windows;
  using System.Windows.Controls;
  using System.Windows.Data;
  using System.Windows.Documents;
  using System.Windows.Input;
  -using System;
  -using System.Threading;
  -using System.Threading.Tasks;
  -using System.Windows;
  -using System.Windows.Input;
  using System.Windows.Media.Animation;
  using Google.Apis.Auth.OAuth2;
  using Google.Apis.Oauth2.v2;
  