System.IO.FileNotFoundException: Could not load file or assembly 'CefSharp.Core.Runtime.dll' or one of its dependencies.

[u-netanel]

I think the issue of runtime System.IO.FileNotFoundException: 'Could not load file or assembly 'CefSharp.Core.Runtime.dll' or one of its dependencies. The specified module could not be found.' (see details here (https://stackoverflow.com/questions/66359832/how-can-i-fix-cefsharp-problem-after-update)) is related to differing Product version numbers on CefSharp.dll and 2 other files (version 88.2.90.0) and CefSharp.Core.Runtime.dll (version 88.2.90). It may be (also) related to the version numbers appearing on the NuGet Package manager - it is 88.2.9 for Cef.redist.x86 and 88.2.90 for CefSharp.Common and CefSharp.WinForms.
In any case I am eagerly expecting the issue to be fixed.
Thank you

Originally posted by @u-netanel in #3319 (comment)

[amaitland]

As per #3319 (comment)

The difference in version number has nothing to do with any runtime error you are seeing.

Are you upgrading from a previous version?

Also please answer the questions listed https://github.com/cefsharp/CefSharp/wiki/Questions-&-Support#when-asking-a-question-please-include-the-following

[amaitland]

If you wish to move the dependencies/resources to a subfolder then extra steps are required. You can see #3371 for a discussion on the topic.

[Cla222]

@u-netanel , @amaitland
I have read about your solution but I cannot understand how to implement it .... how did you do it?

the error occurs at installation, and the files (all of them, even the one that gives me problems) are all present in the "application files" folder
among other things, the error also presents it on the same pc, where CEF is correctly installed as it works in debug

thanks for your help :)

Claudio

[amaitland]

the error occurs at installation, and the files (all of them, even the one that gives me problems) are all present in the "application files" folder
among other things, the error also presents it on the same pc, where CEF is correctly installed as it works in debug

@Cla222 If the application runs from within Visual Studio then it's likely a problem with your installer. Try copying the files from your debug folder to your install path as a test.

Please provide additional information, what installer you are using, .net version, version of CefSharp, etc.

[Cla222]

Hi @amaitland and thanks for your reply..

I tried to copy the files manually (green block, the red block is related to the files that were already present following the publication) but it continues to give problems .... among other things I have created a new project on purpose with only CEFSHARP , so as to circumscribe the problem, but the problem persists

OS Win10 (64bit)

the version of CEF is the latest available, I remem95, I updated it the other day)

I publish directly from VS, and I have verified that I have installed the Visual C++ 2015-2019 Redistributable version

VS 2019

Another thing...the problem is not only to install the program on another host, but also in the same where the debug is ok!

[amaitland]

I tried to copy the files manually (green block

Did you copy the folders from your packages directory? You need to copy the files from your bin folder.

I publish directly from VS,

If you are using Clickonce then you need to follow the instructions at #3613 (comment)

Another thing...the problem is not only to install the program on another host, but also in the same where the debug is ok!

That's expected if your installer isn't copying all the required files.

[Cla222]

@amaitland

I also tried this way (see image), and for scruple also putting all the files in the main dir, where the setup.exe file is present, but it keeps giving the same error ... what am I wrong again?

I have not yet tried the modifications you suggest regarding the Click Once, I was thinking first of solving the problem in the "rough and rustic" way, which might be enough for me ... however, while I await your response on my attempt, I give it a look

as always thanks ....

[Ysera86]

Cheers @amaitland , thanks for responding.
In my case, the block starts and ends as the following :

1>CefSharpAfterBuildDiagnostic:
1> CefSharp After Build Diagnostic
1> CefSharpBuildAction = None
1> CefSharpPropertiesLoaded = true
1> CefSharpTargetDir =
1> CefSharpTargetDirAnyCpu32 = x86
1> CefSharpTargetDirAnyCpu64 = x64
1> CefSharpAnyCpuSupport =
1> RuntimeIdentifier =
1> EffectivePlatform =
1> Platform = AnyCPU
1> PlatformName = AnyCPU
1> Platforms =
1> PlatformTarget =
1> CefSharpPlatformTarget = AnyCPU
1> PlatformTargetAsMSBuildArchitecture = CurrentArchitecture
1> TargetFramework =
1> TargetFrameworkVersion = v4.7.2
1> libcef.dll exists AnyCPU(x86) = bin\x86\libcef.dll
1> libcef.dll exists AnyCPU(x64) = bin\x64\libcef.dll
1> CefSharpTransformXmlDllPath = C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VisualStudio\v17.0\Web\Microsoft.Web.Publishing.Tasks.dll
1> NuGetProjectStyle =
1> NuGetToolVersion =
1> OutputType = Library
1> OutDir = bin
1> Prefer32Bit = false

If I change to the following setting :

1>CefSharpAfterBuildDiagnostic:
1> CefSharp After Build Diagnostic
1> CefSharpBuildAction = None
1> CefSharpPropertiesLoaded = true
1> CefSharpTargetDir =
1> CefSharpTargetDirAnyCpu32 = x86
1> CefSharpTargetDirAnyCpu64 = x64
1> CefSharpAnyCpuSupport =
1> RuntimeIdentifier =
1> EffectivePlatform =
1> Platform = x86
1> PlatformName = x86
1> Platforms =
1> PlatformTarget = x86
1> CefSharpPlatformTarget = x86
1> PlatformTargetAsMSBuildArchitecture = x86
1> TargetFramework =
1> TargetFrameworkVersion = v4.7.2
1> libcef.dll exists = bin\x86\x86\libcef.dll
1> CefSharpTransformXmlDllPath = C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Microsoft\VisualStudio\v17.0\Web\Microsoft.Web.Publishing.Tasks.dll
1> NuGetProjectStyle =
1> NuGetToolVersion =
1> OutputType = Library
1> OutDir = bin\x86\x86
1> Prefer32Bit = false
1>
1>Build succeeded.

[amaitland]

executable which is not mine.

What architecture does the host application target? x86, x64 or AnyCpu?

When you upgraded the CefSharp Nuget package were any other changes made? Use your source control to check.

Whoever setup your solution did something odd in adding x86 to the Configuration dropdown(first dropdown), usually this would be just Debug or Release.

[Ysera86]

Hey there @amaitland ,
1 - The app is 32bit arch. on 64 bit clients.
2 - browser2.JavascriptObjectRepository.Settings.LegacyBindingEnabled = true; is the only change I've made, the cef upgrade needded this one.
3 - We've been using Any CPU, Debug. I've added the other setup for display purposes to your question.

[amaitland]

If your host application is x86 then I'd be building the library as x86 or AnyCpu with Prefer32Bit true.

[Ysera86]

Thank you @amaitland ! I'Ve changed AnyCpu to x86 and here it is. How could I not think of this. Anyways thanks for your time and help. Really appreciated!

[mcpbcs]

Hello, I use this instructions to compile en AnyCpu, I am using 114.2.120 version of nuget package

1.- Install X64 version of Microsoft Visual C++ Redistributable latest supported downloads
from here (Visual Studio 2015, 2017, 2019, and 2022)
https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170

I followed this instruccions:

https://github.com/cefsharp/CefSharp.MinimalExample/blob/master/CefSharp.MinimalExample.WinForms/CefSharp.MinimalExample.WinForms.csproj

2.- Edit your project.csproj file and add the tags on the firts <PropertyGroup>

<CefSharpAnyCpuSupport>true</CefSharpAnyCpuSupport>
<CefSharpBuildAction>Content</CefSharpBuildAction>

and (see https://github.com/cefsharp/CefSharp.MinimalExample/blob/master/CefSharp.MinimalExample.WinForms/CefSharp.MinimalExample.WinForms.csproj)

  <Target Name="CefSharpAfterBuildDebug" AfterTargets="AfterBuild">
    <CallTarget Targets="CefSharpAfterBuildDiagnostic" />
  </Target>
  <Import Project="..\packages\CefSharp.Common.114.2.120\build\CefSharp.Common.targets" Condition="Exists('..\packages\CefSharp.Common.114.2.120\build\CefSharp.Common.targets')" />

Added this lines to the program.cs

            CefRuntime.SubscribeAnyCpuAssemblyResolver();

                var settings = new CefSettings()
                {
                    //By default CefSharp will use an in-memory cache, you need to specify a Cache Folder to persist data
                    CachePath = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.LocalApplicationData), "CefSharp\\Cache")
                };
                settings.CefCommandLineArgs.Add("enable-media-stream");
                //https://peter.sh/experiments/chromium-command-line-switches/#use-fake-ui-for-media-stream
                settings.CefCommandLineArgs.Add("use-fake-ui-for-media-stream");
                //For screen sharing add (see https://bitbucket.org/chromiumembedded/cef/issues/2582/allow-run-time-handling-of-media-access#comment-58677180)
                settings.CefCommandLineArgs.Add("enable-usermedia-screen-capturing");

                //Perform dependency check to make sure all relevant resources are in our output directory.
                Cef.Initialize(settings, performDependencyCheck: true, browserProcessHandler: null);

!! And its working now on any cpu !!!

before close your program you need to call Shutdown.. In windows forms I use:

 protected override void OnClosing(CancelEventArgs e)
        {
            Cef.Shutdown();

            base.OnClosing(e);
        }

And.. the log:

17>  CefSharp After Build Diagnostic
17>  CefSharpBuildAction = Content
17>  CefSharpPropertiesLoaded = true
17>  CefSharpTargetDir = 
17>  CefSharpTargetDirAnyCpu32 = x86\
17>  CefSharpTargetDirAnyCpu64 = x64\
17>  CefSharpAnyCpuSupport = true
17>  RuntimeIdentifier = 
17>  EffectivePlatform = 
17>  Platform = AnyCPU
17>  PlatformName = AnyCPU
17>  Platforms = 
17>  PlatformTarget = AnyCPU
17>  CefSharpPlatformTarget = AnyCPU
17>  PlatformTargetAsMSBuildArchitecture = CurrentArchitecture
17>  TargetFramework = 
17>  TargetFrameworkVersion = v4.5.2
17>  libcef.dll exists AnyCPU(x86) = bin\Debug\x86\libcef.dll
17>  libcef.dll exists AnyCPU(x64) = bin\Debug\x64\libcef.dll
17>  CefSharpTransformXmlDllPath = C:\Program Files\Microsoft Visual Studio\2022\Enterprise\MSBuild\Microsoft\VisualStudio\v17.0\Web\Microsoft.Web.Publishing.Tasks.dll
17>  NuGetProjectStyle = 
17>  NuGetToolVersion = 
17>  OutputType = WinExe
17>  OutDir = bin\Debug\
17>  Prefer32Bit = false

[It-Techus2011]

Thanks for your help.
I followed all the step as mentioned above and still getting error "Could not load file or assembly 'CefSharp.Core.Runtime.dll' or one of its dependencies. The specified module could not be found.". I'm running on Windows 10 pro. Please let me know.

[It-Techus2011]

[BabakSouth]

Please just install this file in your machine. your issue will be resolved.
https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170

[It-Techus2011]

I followed all the step as mentioned above BY [mcpbcs] and still getting error "Could not load file or assembly 'CefSharp.Core.Runtime.dll' or one of its dependencies. The specified module could not be found.". I'm running on Windows 10 pro. Please let me know.

[BabakSouth]

I don't have any problem for its dependencies. I am sure you should install vc-redist x64 on your machine . this your mentioned error message will be gone.

[It-Techus2011]

I did installed from : https://learn.microsoft.com/en-us/cpp/windows/latest-supported-vc-redist?view=msvc-170
BUT still getting error on windows 10 pro and windows 11.

I used following Code:
//// Initialize CefSharp
var settings = new CefSettings();
Cef.Initialize(settings);

Please let me know anything wrong.
Thanks for your time.

[gustavo-cantero]

I've the same problem, were you able to solve it?

[It-Techus2011]

I installed 32 bits, which fixed it. because my .net app was compiled in x86.

X86 https://aka.ms/vs/17/release/vc_redist.x86.exe Permalink for latest supported x86 version

[cebik]

@It-Techus2011 was right! Installing the 32-bit version of the C++ libraries solves the problem.
https://aka.ms/vs/17/release/vc_redist.x86.exe
Permalink for latest supported x86 version

[SimonKravis]

Same problem - works in Visual Studio 2022 compiled to 64 bit, doesn't work after installation on different 64 bit Win 11. Installing 32-bit c++ library vc_redist.x86.exe on didn't fix it. Cannot build as Any CPU 32-bit preferred as suggested as other components fail. Build for target Any CPU without 32-bit preferred also fails.

When I run Dependencies(x64) on CefSharp.core.runtime.dll on the Win 11 machine where the app fails, no dependencies show as missing even though the error 'could not load "CefSharp.core.runtime.dll" or one of its dependencies is missing' is thrown when I try to load CefSharp web browser. libcef.dll shows chrome_elf.dll as missing, but when it is added, another instance of the app is started when the CefSharp web browser is loaded on the Win 11 machine. On the Dev machine it still works OK.

[amaitland]

compiled to 64 bit, doesn't work after installation on different 64 bit Win 11. Installing 32-bit c++ library vc_redist.x86.exe on didn't fix it.

If you compiled your app as x64 then you need the x64 build of VC++ Redist. The Redist must match the process architecture.