MicrosoftEdge / MicrosoftEdge/WebView2Feedback

[Problem/Bug]: Error on initialization using WebView2CompositionControl on .net core 8.0 on a shared project

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#5,169 2 comments 0 reactions 1 assignee View on GitHub

@Navdeep-ss is already working on this.

Since Mar 24, 2025.

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Description

What happened?

I have a shared project with a WPF with a WebView2CompositionControl, on a project with .net framework 4.5 everything works but then loading the WPF on a .net core 8.0 project I get the following on initialization of the WPF:

Could not load type 'Microsoft.Web.WebView2.Wpf.WebView2CompositionControl' from assembly 'Microsoft.Web.WebView2.Wpf, Version=1.0.2045.28, Culture=neutral, PublicKeyToken=2a8ab48044d2601e'.

Importance

Important. My app's user experience is significantly compromised.

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

1.0.3124.44

SDK Version

No response

Framework

WPF

Operating System

Windows 11

OS Version

26100.3476

Repro steps

Create a WPF with a WebView2CompositionControl in a shared project. Call that shared project from a .net core project, and it will throw an error when initializing. I tried all the versions where WebView2CompositionControl is available and had the same issue

Repros in Edge Browser

Yes, issue can be reproduced in the corresponding Edge version

Regression

No, this never worked

Last working version (if regression)

No response

Contributor guide

No contributing guide indexed for this repository

First steps

  1. Read the whole issue, then the project's contributing guide.
  2. Comment on the issue to say you are picking it up — it saves two people doing the same work.
  3. Fork the repository and make your change on a branch.
  4. Open a pull request that references the issue number.

Assessment

This issue has not been assessed yet.

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