Question

I just created a new WPF project, but I decided to make a different organization of the folders, to make them look like this:

So I want all my interfaces to be on src folder. But when I press F5 and try to run it, the debugger says it can’t find MainWindow.xaml. The xaml look like this:

App.xaml

<Application x:Class="MyNamespace.App"
         xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
         xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
         StartupUri="MainWindow.xaml">
<Application.Resources>

</Application.Resources>

MainWindow.xaml

<Window x:Class="MyNamespace.MainWindow"
    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
    Title="MainWindow" Height="350" Width="525">
<Grid>

</Grid>

Apparently they share the same namespace, but it’s not finding the MainWindow.xaml… Any idea why?

App.xaml.cs

namespace MyNamespace.src
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application
    {
    }
}

MainWindow.xaml.cs

namespace MyNamespace
{
    /// <summary>
    /// Interaction logic for MainWindow.xaml
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }
    }
}  

Answer 1

Your MainWindow is in the the "src" folder.

The StartupUri is relative to the structure of your project.
So StartupUri = "src\MainWindow.xaml" should work.