CefSharp.Common.NETCore some dlls target framework is not .netCore, it is still .NetFramwork

[thudugala]

CefSharp.Common.NETCore some dlls target framework is not .netCore, it is still .NetFramwork

Due to this I'm getting below error

Could not load file or assembly 'CefSharp.Core.Runtime, Version=91.1.211.0, Culture=neutral, PublicKeyToken=40c4b6fc221f4138'. An attempt was made to load a program with an incorrect format.

when .Net 4.8 is turned off in the computer

Is there any alternative to fix this ?

[amaitland]

CefSharp.Common.NETCore some dlls target framework is not .netCore, it is still .NetFramwork

The dlls you've highlighted are mixed mode C++/CLI dlls. They are built with a target framework of. Net Core 3.1.

https://github.com/cefsharp/CefSharp/blob/cefsharp/91/CefSharp.Core.Runtime/CefSharp.Core.Runtime.netcore.vcxproj#L31
https://github.com/cefsharp/CefSharp/blob/cefsharp/91/CefSharp.BrowserSubprocess.Core/CefSharp.BrowserSubprocess.Core.netcore.vcxproj#L31

What tool are you using to inspect the assemblies? Is it the most up to date version?

They are not standard CLI assemblies.

when .Net 4.8 is turned off in the computer

What OS? Is Visual C++ 2019 installed on the target machine? What version of. Net are you targeting? What version was installed on the target machine?

https://github.com/cefsharp/CefSharp/blob/cefsharp/91/NuGet/PackageReference/Readme.txt#L22

Could not load file or assembly 'CefSharp.Core.Runtime, Version=91.1.211.0, Culture=neutral, PublicKeyToken=40c4b6fc221f4138'. An attempt was made to load a program with an incorrect format.

The most common cause of this error is that Visual C++ 2019 is missing from the target machine.

[amaitland]

are reporting as .Net Framwork 4.0

What software are you using to inspect the dlls? Whatever software you are using is likely too old to correctly identify the dlls.

They are both .Net Core 3.1.

Please download the latest version of dotPeek and check with that.

"cefsharp.common.netcore.91.1.211\ref\netcoreapp3.1\CefSharp.Core.Runtime.dll"
is reporting as netcoreapp3.1

The ref assembly is a managed assembly, unlike the others which are mixed mode C++/CLI. The ref assembly is used at compile time.

[thudugala]

I'm using the same version

[amaitland]

I don't know what you are doing differently, I can assure you they are targeting .Net Core 3.1

The builds are done using different virtual machines, so their is no scope for the incorrect version to be included as part of the package. We also use features that aren't present in .Net 4.0, so this just isn't possible.

The exception you are seeing is 99% of the time a result of either missing VC++ or missing files.

What version of .Net are you targeting? What version of the runtime is installed on your target machine?

[amaitland]

IlSpy confirms .Net Core 3.1.

Please confirm you have tested with https://www.nuget.org/api/v2/package/CefSharp.Common.NETCore/91.1.211 (manually download and unzip).

The https://www.nuget.org/api/v2/package/CefSharp.Common/91.1.211 package will have a similar structure, it will include .Net 4.5.2 dlls in the Net Core 3.0 folder. This was a hack used until full .Net Core 3.1 support could be added. This older package would require .Net 4.5.2 to run the BrowserSubProcess that's included by default. The newer CefSharp.Common.NETCore package only requires .Net Core 3.1 or higher.

[amaitland]

Using a Win8.1 IE11 virtual machine

• Removing .Net 4.5
• Installing Visual C++ 2019 x64
• Installing .Net Core 3.1 Desktop Runtime x64
• Publish CefSharp.MinimalExample.WinForms.netcore (.Net Core 3.1 and win-x64).

The example runs as expected.

I can find no indication the NetCore packages are incorrectly targeting .Net 4