Description
Issue Title
Problem with loading component in WPF project by calling Application.LoadComponent(Uri).
General
Version: .NET Core 3.0.0 Preview 8.
OS: Windows 10.
Visual Studio: 2019 16.2.1.
Project Sdk: Microsoft.NET.Sdk.WindowsDesktop.
In the next scenario Application.LoadComponent(Uri) throws exception.
Created a simple WPF application with classe App and MainWindow.
<Project Sdk="Microsoft.NET.Sdk.WindowsDesktop">
<PropertyGroup>
<OutputType>WinExe</OutputType>
<TargetFramework>net472</TargetFramework>
<UseWPF>true</UseWPF>
<AssemblyVersion>1.2.3.54</AssemblyVersion>
</PropertyGroup>
</Project><Window x:Class="WpfApp1.MainWindow"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Title="MainWindow" Height="450" Width="800">
<Grid>
<Border x:Name="Foo" />
</Grid>
</Window>public partial class App : Application
{
protected override void OnStartup(StartupEventArgs e)
{
base.OnStartup(e);
var uri = new Uri("/WpfApp1;component/mainwindow.xaml", UriKind.Relative);
var window = LoadComponent(uri); // Exception: Cannot register duplicate Name 'Foo' in this scope.
}
}Key points here are <AssemblyVersion> in csproj file and named element in MainWindow xaml file. When it's declared, the window code generator creates code like System.Uri resourceLocater = new System.Uri("/WpfApp1;V1.2.3.54;component/mainwindow.xaml", System.UriKind.Relative);. As you can see, there's version element in URI. But when <AssemblyVersion> is not declared, or version is declared in code ([assembly:AssemblyVersion("...")]), then version is missing in generated URI, and exception is not throwing. Same for UserControls.