Why we get this exception system.windows.markup.xamlparseexception: 'must create dependencysource on same thread as the dependencyobject.' while updating the UI ?

See more:

C#

WPF

C#5.0

i was trying get the details using task asynchronously and
update ui
.but i always getting the exception
System.Windows.Markup.XamlParseException: 'Must create DependencySource on same Thread as the DependencyObject.

What I have tried:

public void performwindowchanges()
{
 Task<bool> t = Task.Run(async () =>
                        {
                            string authUrl ="url";
                            string data = await NetworkUtility.GetInstance().GetHttpRequestAsync(authUrl, 1);
                            return true;
                        });

                      t.ContinueWith(async (t1) =>
                        {
                            if (t1.Result)
                            {
                              string  status = await Applicationmeth.GetUserDetails();
                                if (status == "Success")
                                     this.Dispatcher.Invoke(() =>
                                  {
                                    InitializeMainwindow();//facing issue in this method
                                  });
                            }
                        });
}

Private void InitializeMainwindow()
{
                          screenWindow = new ScreenWindowControl(); 
                        Application.Current.MainWindow = screenWindow;
                    screenWindow.Show();//HERE IAM GETTING EXCEPTION AS Must create DependencySource on same Thread as the DependencyObject.
                    this.Close();
}