Question

Stupidly, I deleted my App.xml and App.xml.cs files by mistake.

I am able to recreate these files as I use source control (a bit out of date, regrettably), however when I recreate these files and add them back into my project, VS cannot build the project because I’m informed I don’t have an entry point.

My workaround is to create a loading class with a ‘Main’ keyword for application entry and associate is with the project, however what is the correct procedure for recreating and re-associating my App.xml and App.xml.cs files in VS in my project.

Many thanks.

Answer 1

Your question intrigued me, so I created a new project and blew away the App.xaml and App.xaml.cs files. I then added a window to the project and changed its Build Action in the File Properties editor to ApplicationDefinition from Page, I then changed the xaml and the xaml.cs files to the Application Class. After which it worked correctly.

i.e.

App.xaml

<Application x:Class="WpfApplication1.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>
</Application>

App.xaml.cs

using System;
using System.Collections.Generic;
using System.Configuration;
using System.Data;
using System.Linq;
using System.Windows;


namespace WpfApplication1
{
    /// <summary>
    /// Interaction logic for App.xaml
    /// </summary>
    public partial class App : Application 
    {

    }
}