Task.Factory.StartNew((args) =>
 {
  string serverName = (string)((object[])args)[0];
  string userName = (string)((object[])args)[1];
  string pwd = (string)((object[])args)[2];
  string dbName = (string)((object[])args)[3];
  Exception exc;
  bool rc = SQLServerDbConnectionInfo.CheckConnection(serverName, userName, pwd, dbName, out exc);
  return new object[] { rc, exc?.Message, dbName, serverName, userName };
 }, new object[] { this.ServerName, this.UserName, this.Password, this.DatabaseName }).ContinueWith((t) =>
 {
  this.IsBusy = false;
  if (!t.IsCompleted || t.IsFaulted || !(bool)t.Result[0])
  {
   StringBuilder sb = new StringBuilder();
   sb.AppendFormat((string)WPFLocalizeExtension.Engine.LocalizeDictionary.Instance.GetLocalizedObject("myAssembly:Properties.Resources:DBConnectionFailedExtendedMessage", null, WPFLocalizeExtension.Engine.LocalizeDictionary.Instance.Culture), (string)t.Result[2], (string)t.Result[3], (string)t.Result[4]);
   if (!String.IsNullOrEmpty((string)t.Result[1]))
   {
    sb.Append(System.Environment.NewLine);
    sb.AppendLine((string)t.Result[1]);
   }
   var parentWindow = Window.GetWindow(this);
   if (parentWindow == null)
   {
    parentWindow = Application.Current?.MainWindow;
   }
   MessageBox.Show(parentWindow, sb.ToString(), (string)WPFLocalizeExtension.Engine.LocalizeDictionary.Instance.GetLocalizedObject("myAssembly:Properties.Resources:ConnectionFailed", null, WPFLocalizeExtension.Engine.LocalizeDictionary.Instance.Culture));
   if (onCompletedAction != null)
   {
    onCompletedAction(false);
   }
  }
  else
  {
   if (showSuccessMsgBox)
   {
    var parentWindow = Window.GetWindow(this);
    if (parentWindow == null)
    {
     parentWindow = Application.Current?.MainWindow;
    }
    MessageBox.Show(parentWindow, (string)WPFLocalizeExtension.Engine.LocalizeDictionary.Instance.GetLocalizedObject("myAssembly:Properties.Resources:ConnectionTestSucceeded", null, WPFLocalizeExtension.Engine.LocalizeDictionary.Instance.Culture), null);
   }
   if (onCompletedAction != null)
   {
    onCompletedAction(true);
   }
  }
 }, TaskScheduler.FromCurrentSynchronizationContext());