Change Startup Window

Question

I am using Visual Studio 2012 C#. I have created a WPF application project with a main window and added a login window to my project. I want to change the startup window to

Answer 1

use Application.Current.Run Instead of Application.Run

Answer 2

To change startup window update App.xaml by changing Application.StartupUri:

<Application ... StartupUri="MainWindow.xaml">

Answer 3

To change the startup window programmatically go to App.xaml remove the line StartupUri="MainWindow.xaml" (This will remove the default startup window configuration), now add the startup event Startup="Application_Startup", in App.xaml.cs

private void Application_Startup(object sender, StartupEventArgs e)
{
  If(somecase)
   {
     MainWindow mainWindow = new MainWindow ();
     mainWindow.Show();
   }
  else
   {
     OtherWindow otherWindow= new OtherWindow();
     otherWindow.Show();
   }
}