Error APPX1101: [UWP] Payload contains two or more files with the same destination path: Microsoft.Web.WebView2.Core.dll

Ravi Khandale 5

Installed Visual Studio 2022 (on a clean/fresh Windows 11 installation) version 17.10.0
Installed Microsoft.Identity.Client.Desktop Nuget package to open sign in within the window application.
After that I'm getting "Found multiple publish output files with the same relative path: Microsoft.Web.WebView2.Core.dll" issue
I did noticed whilst installing Microsoft.Identity.Client.Desktop that Microsoft.Web.WebView2 (version 1.0.864.35) got installed as well.
But I'm guessing (from the Error) that there is another version of Microsoft.Web.WebView2 in MSIX Packaging in the Project folder.

What I tried:

I tried adding the following property to my .csproj files

<PropertyGroup>
 <ErrorOnDuplicatePublishOutputFiles>false</ErrorOnDuplicatePublishOutputFiles>
</PropertyGroup>


But that gave me following error:

powershell
)
Severity  Code  Description  Project  File  Line  Suppression State Error (active)  APPX1101  Payload contains two or more files with the same destination path 'Microsoft.Web.WebView2.Core.dll'. Source files:  C:\Users\P63241\source\repos\BHE.GridSwift.App\Source\BHE.GridSwift.App.Client\obj\Debug\net8.0-windows10.0.19041.0\win10-x64\MsixContent\Microsoft.Web.WebView2.Core.dll C:\Users\P63241\.nuget\packages\microsoft.web.webview2\1.0.864.35\lib\netcoreapp3.0\Microsoft.Web.WebView2.Core.dll

I tried deleting the 'bin' and 'obj' folders from the Project folder and rebuilding solution but that gave me a bunch of other errors.
I tried uninstalling (Start menu > right click on it, uninstall), and then cleaning the solution in Visual Studio before trying to deploy it again

At this point I tried everything and anything that I could find online - posting a question here is my last resort

How can I solve this version conflict?

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 44,011 Reputation points Microsoft Vendor

2024-07-16T02:25:03.0033333+00:00
I tested it with the MAUI version of .net 8.0 and the issue did not occur.

To investigate further, could you please provide the following information?

What is the MAUI version number you are using?

Microsoft.Identity.Client.Desktop is a desktop package based on WinUI3. For MAUI, the official recommendation is to use Microsoft.Identity.Client. If you refer to Add the Microsoft Identity Client to your app for operation, will this problem occur?

Your prompt reply will be highly appreciated.
Ravi Khandale 5 Reputation points

2024-07-16T06:37:21.94+00:00
MAUI version number is 8.0.300.

We couldn't find ".WithWindowsEmbeddedBrowserSupport()" in Microsoft.Identity.Client NuGet So we downloaded Microsoft.Identity.Client.Desktop NuGet to get that. Could you tell me how we can find .WithWindowsEmbeddedBrowserSupport() in Microsoft.Identity.Client?

The reason why we use .WithWindowsEmbeddedBrowserSupport(), we need to open the AAD sign inside the window app, not outside the app, which means outside the browser. Could you help us to resolve this issue.

60856927 66

I have the same problem.
Cannot figure out how to delete the old version

Severity	Code	Description	Project	File	Line	Suppression State	Details
Error		Payload contains two or more files with the same destination path 'Microsoft.Web.WebView2.Core.winmd', but they are different sizes. Source files: 
D:\.nuget\packages\microsoft.web.webview2\1.0.2651.64\lib\Microsoft.Web.WebView2.Core.winmd
D:\.nuget\packages\microsoft.web.webview2\1.0.1264.42\lib\Microsoft.Web.WebView2.Core.winmd	WapProProj	C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Microsoft\VisualStudio\v17.0\AppxPackage\Microsoft.AppXPackage.Targets	2007

1 answer

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 44,011 Reputation points Microsoft Vendor

2024-07-17T02:09:56.7166667+00:00
Hello,

MAUI has a built-in browser, so you don't need to use this API to call it in MAUI. You can find instructions for this in DesktopExtensions.WithWindowsEmbeddedBrowserSupport Method of this API.

This is not required for MAUI / WinUI applications. This is ignored on Mac and Linux.

For how to use the embedded browser in MAUI, you can refer to the following document to enable it by setting a boolean value.

Embedded web view vs system browser

Generally, it's recommended that you use the platform default, and this is typically the system browser. The system browser is better at remembering the users that have logged in before. To change this behavior, use WithUseEmbeddedWebView(Boolean)

Best Regards,

Alec Liu.

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Ravi Khandale 5 Reputation points

2024-07-17T15:28:32.0366667+00:00

I tried to use WithUseEmbeddedWebView(Boolean) but same issue occur.

I followed below steps-

Added WithUseEmbeddedWebView(Boolean) in builder and run the code then I'm getting error to enable the embedded WebView on windows, install Microsoft.Identity.Client.Desktop

Installed Microsoft.Identity.Client.Desktop

After installation getting conflicts error due to nuget dependency on webview as mentioned below Could you please help me on resolve this conflicts issue?

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 44,011 Reputation points Microsoft Vendor

2024-07-18T05:29:48.82+00:00

After investigation, the problem lies in the installation of Microsoft.Identity.Client.Desktop. In fact, WebView2-related dependencies have been integrated in .net-windows, which leads to this problem.

According to the documentation, the package you need to install is Microsoft.Identity.Client, and use the embedded browser in the following way.

var options = new SystemWebViewOptions() { HtmlMessageError = "<p> An error occurred: {0}. Details {1}</p>", BrowserRedirectSuccess = new Uri("https://www.microsoft.com"); } await pca.AcquireTokenInteractive(s_scopes) .WithUseEmbeddedWebView(true) .WithSystemWebViewOptions(options) .ExecuteAsync();

Ravi Khandale 5 Reputation points

2024-07-18T17:55:39.74+00:00

I used the way that you mentioned but still issue persist. There is new issue came as follow

Could you please help me on resolve this issue?

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 44,011 Reputation points Microsoft Vendor

2024-07-19T05:36:33.5933333+00:00

This error means both the embedded browser and the system browser are set; you can try to use the following code to use only the embedded browser.

var result = app.AcquireTokenInteractive(scopes) .WithUseEmbeddedWebView(true) .ExecuteAsync();

Ravi Khandale 5 Reputation points

2024-07-19T07:15:09.6133333+00:00

I followed the same way you mentioned but still issue is persist. I'm getting error to enable the embedded WebView on windows, install Microsoft.Identity.Client.Desktop

Suppose I install Nuget, then we will get a conflict error due to the Nuget dependency on the webview, as mentioned below.

Could you please help me on resolve this issue?

Yonglun Liu (Shanghai Wicresoft Co,.Ltd.) 44,011 Reputation points Microsoft Vendor

2024-07-22T07:50:44.81+00:00

Thanks for your feedback.

According to the documentation, MAUI does not require this package to use the embedded browser for authentication.

Embedded web views can be enabled in .NET MAUI applications. You may choose to use either embedded web views or system browsers. This is your choice depending on the user experience and security concerns you want to target.

For this unexpected issue, it is recommended that you report it to Github to make the development team aware of it.
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Error APPX1101: [UWP] Payload contains two or more files with the same destination path: Microsoft.Web.WebView2.Core.dll

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