[Problem/Bug]: NuGet package Microsoft.Web.WebView2 build files do not work in some MsBuild scenarios

[joergrosenkranz]

What happened?

Building a CSPROJ with MSBuild does not work when the targets restore and Build are called in the same MSBuild run.

The error was introduced with the new non-standard NuGet structure.

Importance

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

Runtime Channel

Stable release (WebView2 Runtime)

Runtime Version

No response

SDK Version

1.0.2849.39

Framework

Winforms

Operating System

Windows 10

OS Version

No response

Repro steps

Create a sample project:

dotnet new classlib -f net8.0 -o WebView2Test
cd .\WebView2Test\
dotnet add package Microsoft.Web.WebView2

Add a Test.cs file:

namespace WebView2Test;

using Microsoft.Web.WebView2.Core;

public class Test
{
    public static async Task Initialize()
    {
        await CoreWebView2Environment.CreateAsync();
    }
}

Build using this command:

msbuild /T:"restore;Build" .\WebView2Test.csproj

Result (sorry, machine has German culture):

error CS0234: Der Typ- oder Namespacename "Web" ist im Namespace "Microsoft" nicht vorhanden. (Möglicherweise fehlt ein Assemblyverweis.)

Repros in Edge Browser

No, issue does not reproduce in the corresponding Edge version

Regression

Regression in newer SDK

Last working version (if regression)

1.0.2592.51

[oggy22]

Thank you for reporting. Can you please try with the latest prerelease https://www.nuget.org/packages/Microsoft.Web.WebView2/1.0.2895-prerelease. The issue might have been fixed.

[joergrosenkranz]

No, the bug is not fixed with the preview version.

[oggy22]

Ok, thanks for trying. Can you please provide a min repro so we can try to repro your problem? Ideally it should be a min repro which means it all unnecessary pieces would be removed.

[joergrosenkranz]

The minimal repro is already in the repro steps of the bug report.

[ambikakunnath]

I'm unable to repro the issue with the repro steps mentioned. Can you please check if there is anything else needed for the repro? Can you confirm if the project file has the WebView2 package dependency included:

[joergrosenkranz]

If the PackageReference is not there, you've missed this command in the repro steps:

dotnet add package Microsoft.Web.WebView2

Here you can see the complete project:
WebView2Test.zip

Repro is simple:

• Unzip the folder
• Open Developer Command Prompt for VS 2022
• Run this command:

  msbuild /T:"restore;Build" .\WebView2Test.csproj
  

[soumamazu]

This seems to repro only under very specific conditions -

• The project should not be opened with VS first.
• Running msbuild /t:restore;Build gives the error only the first time.
• Consecutive runs of the same command are fine.
• Opening the project in VS and then running the command also seems fine.

From these, there seems to be some issues restoring the WevView2 nuget only for the first time using msbuild and not having previously restored or opened in VS.

[palashchatterjee398]

Exilent