WPF - How to set Start Window

To set the Start window / page in a WPF app, we can configure it in App.xaml file.
In the "Application" element of App.xaml file in your project, set the "StartupUri" attribute to the xaml page you want to load first in the WPF Application.
In the below sample code "QuizTxt2XmlPage.xaml" is the start up page.

<Application x:Class="Quiz.WpfApp.App"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
StartupUri="QuizTxt2XmlPage.xaml">

A reference screen shot is provided below: