I'm getting an unusual error when trying to build my newly created ASP.NET Core 6 project. Although it was working fine for the last few days, this error started appearing suddenly:
Unhandled Exception: System.BadImageFormatException: Could not load
file or assembly 'System.Memory, Version=4.0.1.1, Culture=neutral,
PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The
module was expected to contain an assembly manifest.
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin\Roslyn\Microsoft.CSharp.Core.targets
I tried changing the platform target to other options like x64 or x86, but this problem doesn't seem to come from the project itself. That is because, I created another project to see if it's still appearing. Turns out that this error being thrown even when I build my newly created project.
What could possibly go wrong? Should I reinstall Visual Studio 2022 (Community edition)?
EDIT
Rebooting the system fixed it. This could probably be an issue in my hard disk too as Hans Passant has mentioned in the comments section below.
I am receiving an error when I try to compile my c# source code file on my Mac. Normally I compile my source code using the mcs command on a bash terminal window and it compiles fine. But, this one particular project requires the installation of the NuGet package 'MySql.Data'. This has resulted in the following error message:
error CS0246: The type or namespace name 'MySqlConnection' could not be found. Are you missing an assembly reference?
I have tried to follow numerous solutions online to try and add the assembly reference, but my IDE just does not look like the help documentation's screenshots.
I have tried to Edit References, but no references appear. I tried to manually download the MySql.Data.dll (v.6.3.5.0) but I think it is for an outdated version of the MySql.Data class library as it does not work. Even after cleaning the code and rebuilding it.
Edit: I have also tried to add the dll that was included in the project folder but it said it could not locate the assembly (even though they are both in the same project folder).
Could not resolve this reference. Could not locate the assembly "search_feature". Check to make sure the assembly exists on disk. If this reference is required by your code, you may get compilation errors. (MSB3245) (search_feature)
Edit 2: I renamed the dll file from the project bin folder to MySql.Data.dll and I no longer get the error. But it still won't compile.
The code works fine when run in Visual Studios for Mac, but I just can't compile it. Any ideas how to add the assembly reference?
I am using the most up-to-date version of Visual Studios:
Visual Studios for Mac Community 7.5.4 (build 3)
I have tried uninstalling and reinstalling Visual Studios for Mac.
My code has the library reference at the top: Using MySql.Data.MySqlclient; and the project runs. It just won't compile.
Using Visual Studio 2015 RTM, I have a .NET 4.0 class library project.
I've added the Microsoft.CodeAnalysis.FxCopAnalyzers NuGet package to the project. This results in the following Analyzers being listed for the project in Solution Explorer.
Microsoft.AnalyzerPowerPack.Common
Microsoft.AnalyzerPowerPack.CSharp
System.Runtime.Analyzers
System.Runtime.CSharp.Analyzers
System.Runtime.InteropServices.Analyzers
System.Runtime.InteropServices.CSharp.Analyzers
However in the Error List window, the following error appears:
Unable to load Analyzer assembly
C:\Dev\git\MySolution\packages\System.Runtime.Analyzers.1.0.0\analyzers\dotnet\cs\System.Runtime.Analyzers.dll
: Could not load file or assembly 'System.Runtime.Analyzers,
Version=1.0.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or
one of its dependencies. Strong name validation failed. (Exception
from HRESULT: 0x8013141A)
(and similar for System.Runtime.CSharp.Analyzers and System.Runtime.InteropServices.Analyzers)
The first two analyzers do work correctly, but I'm not getting anything for the last four (probably related to the above errors).
Is there a way to get these to work, or is it possibly related to the project being .NET 4.0?
Thank you for reporting this issue. The System.Runtime.* analyzer assemblies uploaded to nuget are indeed only test-signed, and hence cause the assembly load failures. We are working uploading newer nuget packages for System.Runtime.Analyzers and System.Runtime.InteropServices.Analyzers which will have signed assemblies.
Meanwhile, you can get the non System.Runtime based FXCop analyzers by installing "Microsoft.AnalyzerPowerPack" from here: https://www.nuget.org/packages/Microsoft.AnalyzerPowerPack/. These do contain all signed assemblies and should work fine.
I'll post an update on this thread once we have uploaded signed System.Runtime analyzer packages.
Sorry for the inconvenience and thanks again for reporting it!
Regards,
Manish
So, I've got a C# windows workflow project that creates a report programmatically and emails it out. It works fine on my local machine, but putting it on a scheduler in a different machine generates the following error:
Could not load file or assembly 'Microsoft.ReportViewer.Common, Version=11.0.0.0, Culture=neutral, PublicKeyToken=89845dcd8080cc91' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
Based on other topics, I tried installing MICROSOFT® REPORT VIEWER 2012 RUNTIME from the following address: http://www.microsoft.com/en-us/download/details.aspx?id=35747. This didn't help. This was the overwhelmingly prevalent solution, but I'd love any other suggestions or advice.
The accepted answer pointed me in the right direction. However, didn't provide enough details for me to reach resolution. I wanted to add this as a comment to that answer but it was too long.
In my VS project, I had a reference to Microsoft.ReportViewer.WinForms version 12.0.0.0 and when deploying to another computer got the same error as present in this question. The key to the problem is a portion of the error:
The located assembly's manifest definition does not match the assembly
reference.
It is telling you that it found a DLL with the right name, but it is the wrong version. I had added a reference to Microsoft.ReportViewer.Common through the references dialog but I didn't catch that the only one listed in the "Extensions" section of the references dialog was for version 10.0.0.0. So of course it will deploy the wrong one if you are telling it to deploy the wrong one.
What you have to do is find the Microsoft.ReportViewer.Common.dll file with version 12.0.0.0 on your system and manually include a reference to that. For me it was in the following directory:
C:\Windows\assembly\GAC_MSIL\Microsoft.ReportViewer.Common\12.0.0.0__89845dcd8080cc91\
Once I added that reference and set both DLLs to Copy Local in my VS project, then everything worked on the deployed machine.
Note: I did not require an installation of the Microsoft Report Viewer 2012 Runtime in order to have it work on the deployed machine. For any of you like me that were wanting to avoid any other installations during deployment.
try to add the dll files to the project from :
C:\Program Files\Microsoft Visual Studio 10.0\ReportViewer
add them to the bin folder after publishing the project
We're trying to set up a Jenkins (build server) job to build our Office add-in based on VSTO. However, I keep getting a strange error that fails the build process after the DLL is copied to the bin directory of the project:
Error 11 The "FindRibbons" task failed unexpectedly.
System.IO.FileNotFoundException:
Could not load file or assembly 'MyAddIn, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=null' or one of its dependencies.
The system cannot find the file specified.
File name: 'MyAddIn, Version=1.0.0.0, Culture=neutral, PublicKeyToken=null'
So the problem is that the "FindRibbons" task, triggered by the Office add-in build target, has successfully identified the MyAddIn DLL as being an Office Add-In, but is not able to locate and load it!
Any ideas? I'd love to be able to debug the FindRibbons task directly but hooking into and debugging the compile process seems a little extreme...
Here are some observations:
In our build server's Fusion logs for binding the MyAddIn assembly it looks like it's looking in the folder where MSBuild.exe lives (C:\Windows\Microsoft.NET\Framework\v4.0.30319\) and nowhere else.
On my dev machine, there is no Fusion log entry for MyAddIn! But the build process succeeds and Kivo works fine.
On both my dev and build machines I also have Fusion log entries for WhereRefBind!Host=(LocalMachine)!FileName=(PresentationCore.dll) and ExplicitBind!FileName=(MyAddIn.dll) which show the binding succeeding.
This error comes up on the build server whether I use Visual Studio or MSBuild from the command line to build the project.
I've ensured that the .NET/MSBuild/VS2012 versions are identical on both my dev machine and the build server and the error still occurs. The only difference seems to be that the build server is running Windows Server 2012 (since it's Azure, and we can't spin up a Windows 7 image).
This has worked for me every time I upgrade Visual Studio - I don't use ribbons.
This worked for my solution, but use at your own risk:
Open the following file in an XML editor (make a backup first): C:\Program Files (x86)\MSBuild\Microsoft\VisualStudio\v10.0\OfficeTools\Microsoft.VisualStudio.Tools.Office.targets (the v10.0 part may be different for you, e.g., it might be v14.0)
Remove the following section:
<FindRibbons AssemblyName="$(AbsolutePathToCustomization)" TargetFramework="$(TargetFrameworkVersion)">
<Output TaskParameter="RibbonTypes" ItemName="RibbonTypesCollection"/>
</FindRibbons>
Replace all occurrences of "#(RibbonTypesCollection)" with the empty string ""
Save the file and restart the visual studio
If you migrated the project from a previous version of Visual Studio, be sure to remove the ExcelLocale1033 and SecurityTransparent attributes from the AssemblyInfo.cs file (as answered by Swati in this other question)
If the project still fails to build, it may be because your .csproj file has some references to msbuild's tasks of previous versions of Visual Studio. I suggest you to create a new empty Excel AddIn project, and uses the msbuild structure of the new project file as base for your project.
I had this problem. It was apparently caused because I changed the "Copy Local" setting on reference "Microsoft.Office.Tools.Common.v4.0.Utilities" from True to False. ISYN. (I sh*t you not)
I had upgraded a project from VS2012 to VS2013 and noticed that that reference was the only one set to "Copy Local = True". So I set it to false, because it was different. This caused the error. Changing it back to True solved it.
I had the same error message and finally found a fix. The problem stemmed from the VSTO project being targeted for .NET 4.0 (it seems this is the minimum for VSTO4), while also referencing an assembly built for .NET 3.5. The real culprit was that I had a class in the VSTO project deriving from an interface defined in the .NET 3.5 assembly that in turn derived from a .NET 3.5 library interface. i.e.,
using System.Xml;
class MyVSTOClass : IMy35AssembyInterface // This caused the error
class MyVSTOClass : IXmlSerializable // This compiled OK
using System.Xml;
interface IMy35AssembyInterface : IXmlSerializable
The fix was to update the .csproj to explicitly reference the older version of System.Xml.dll and System.Data.dll which would otherwise default to 4.0 and conflict with the 3.5 assembly references.
<Reference Include="System.Data, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL">
<!--<Aliases>Data2</Aliases>-->
<HintPath>C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Data.dll</HintPath>
<SpecificVersion>True</SpecificVersion>
<Private>False</Private>
</Reference>
<Reference Include="System.XML, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089, processorArchitecture=MSIL">
<!--<Aliases>Xml2</Aliases>-->
<HintPath>C:\Windows\Microsoft.NET\Framework\v2.0.50727\System.Xml.dll</HintPath>
<SpecificVersion>True</SpecificVersion>
<Private>False</Private>
</Reference>
For those who need to simultaneously reference both the newer and older versions of a DLL, note that it is in theory possible using:
extern alias XmlDll1
using XmlDll1::System.Xml
See http://geekswithblogs.net/narent/archive/2008/11/11/126940.aspx for more info.
This problem can also be caused by adding a reference to an unsigned assembly to a signed/strong named add-in project. In my case I added the RestSharp Nuget package and started receiving this error on build as soon as I referenced RestSharp in code. After some digging I noticed that RestSharp was the only unsigned assembly in the project references. If you have this problem, there are 3 possible solutions:
In the case of RestSharp, I found that there was a signed version available on Nuget - searched for "restsharp signed" and installing that solved the problem.
If you have access to the source code, you can configure Visual Studio to build a signed version of the assembly in the Project Properties page.
If you do not have access to the source code, you can sign the assembly with your own key by following these instructions.
I had the same error and none of the answers from the internet help me fix this problem. The reason why I was getting that error is because I was referencing an assembly of type Console Application. I changed that assembly to be of type ClassLibrary and I did not got that exception any more.
Also I would only get that exception when inheriting from a class that was located on my ConsoleApplication. It took me forever to figure it out.
May be a little late here, but I just resolved this for myself - after following numerous suggestions (via google) all of which did not solve my problem I manually went down the line. Turns out I had compiled a set of libraries with a dependent assembly with a lower version (not the latest). In my main project I also had a reference to this dependency but it was pulled via nuget and was at the latest & greatest version. For some reason VS.NET couldn't figure that out and would completely trip out and drop the error you posted. Once I updated the set of libraries to the latest version of the dependency all worked as normal.
The crazy part is - it worked fine initially and then out of nowhere the issue came about. Hope this helps someone along the way.
After enabling Fusion the output showed that it was looking for the assembly in the msbuild/ folder.
I just encountered this same situation today, futzing around for a bit, restarting VS and then rebooting my machine without any success. Than one warning popped out at me - One of my dependent assemblies was not strong named. Setting that assembly to be strong-named solved the problem.
I had the same issue, and even after reading KKG's answer I could not resolve mine.
It turned out to be much simpler for me, but not less frustrating and time consuming. I was working in a Win8.1 VM which does not ship with .net3.5 by default. My .net4 VSTO4 project was referencing an assembly that requires 3.5 somewhere. The same project compiled find on my other VM which was Server2008 and had 3.5 enabled.
In my case, the cause for this error was the mere existence of a field of a generic value type in the assembly (not kidding), e.g.:
class Foo
{
ImmutableArray<int> foo;
}
Workaround (if the additional indirection is acceptable performance-wise):
Wrap the value type in a reference type. This can be done generically with something like
public sealed class Box<T>
{
public readonly T value;
public Box(T value)
{
this.value = value;
}
}
then foo can be of type Box<ImmutableArray<int>>.
I have experienced this same issue with an add-in for Outlook.
The solution for me was to set Embed Interop Types to True on my reference to Office.dll.
This however caused the add-in to crash during startup with an Access Denied on Microsoft.Office.Interop.Outlook. I fixed that issue by setting Embed Interop Types to True on all references to Microsoft.Office.Interop.Outlook.dll as well.
This error can be caused by a clash of dependency versions. For example:
YourAddIn
-- OtherLibrary v1.3
-- BaseLibrary v1.0
-- BaseLibrary v2.0
If a newer version of BaseLibrary v2.0 is released and updated in your project, however this version introduce a breaking change in your other dependency OtherLibrary, you will see this exception because OtherLibrary is still trying to find the old methods that doesn't exist in newer assembly.
Update OtherLibrary with the latest packages will resolve this clash of dependency versions.
This can also happen if the Microsoft.Office.Tools.Outlook.v4.0.Utilities reference is set to <Private>False</Private>.
<Reference Include="Microsoft.Office.Tools.Outlook.v4.0.Utilities">
<!-- Required for FindRibbons task -->
<Private>True</Private>
</Reference>