A little bit of background: I recently recompiled the ServiceStack library from its source code (https://github.com/ServiceStack/ServiceStack). I also recompiled the ServiceStack.Text project, after completing some bug fixes. I copied the ServiceStack.Text dll file into the "lib" folder of the ServiceStack project (it is there because the ServiceStack solution does not include the serializers in Text).
Now I am getting TypeLoadExceptions, as follows:
System.TypeLoadException: Method 'get_StatusCode' in type
'ServiceStack.ServiceInterface.Testing.MockHttpResponse' from assembly
'ServiceStack.ServiceInterface, Version=1.0.0.0, Culture=neutral,
PublicKeyToken=null' does not have an implementation. at
System.Reflection.RuntimeAssembly.GetExportedTypes(RuntimeAssembly
assembly, ObjectHandleOnStack retTypes) at
System.Reflection.RuntimeAssembly.GetExportedTypes() at ----my code
from here...----
I'm not sure what the issue could be. I suspected it could be a circular DLL reference issue (DLL Hell) because ServiceStack.OrmLite is referenced (which also references back to other solutions in this project); however, after removing all references to ServiceStack projects, I still have not solved the problem.
This post seems to have some ideas, but I have not had any luck following through with those: TypeLoadException says 'no implementation', but it is implemented
You're using dirty dlls for the different versions of ServiceStack's components which should all be kept in sync.
In the assembly of each major ServiceStack component dll is marked the version number, this matches up with the version that's deployed on NuGet, e.g. the latest version of ServiceStack is v3.9.38, you would want to ensure that you're using at least v3.9.38 of all the other libraries.
The core ServiceStack dependency matrix looks like:
ServiceStack.Text
+
> ServiceStack.Interfaces
> ServiceStack.Common
+
> ServiceStack.Redis
> ServiceStack.OrmLite
+
> ServiceStack
+
> ServiceStack.ServiceInterface
If you're using v3.9.38 of ServiceStack.dll, you want to make sure that all sub components above ServiceStack is at least at v3.9.38.
Related
* Introduction to the Issue
I am using a software that uses the .Net framework to perform some tasks.
We are trying to use the Mailkit.dll file but when using it we are faced with the message:
Internal : Could not execute code stage because exception thrown by code stage: Could not load file or assembly 'System.Memory, Version=4.0.1.2, Culture=neutral, PublicKeyToken=cc7b13ffcd2ddd51' or one of its dependencies. The located assembly's manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040)
and from what I have concluded so far the Mailkit.dll depends on Mimekit.dll that depends on System.memory.dll, something like that.
Mailkit.dll > Mimekit.dll > System.Memory.dll
Version details:
.Net framework installed on machine: 4.7.3190
.Net framework used by application: 4.7
Mailkit.dll version: 3.4.1
Mimekit.dll Version: 3.4.1
System.Memory.dll in application folder Version:4.6.28619.01
I don't Know what's the issue or why this is happening but I am pretty sure it has to do with version issue so any help is welcomed.
The version numbers you provided are a good starting point.
For .NETFramework 4.7, MailKit v3.4.1 depends on MimeKit v3.4.1 which depends on System.Memory >= v4.5.5.
System.Memory with NuGet version v4.5.5 has an AssemblyFileVersion of 4.6.31308.01 (the number that shows in windows explorer) but an AssemblyVersion of 4.0.1.2. The assembly number is what really matters when the CLR looks for assemblies. The CLR looks for v4.0.1.2 when loading MimeKit but can only find v4.0.1.1.
The version that ends up in your output is older than the version required. I found that the version that is actually in your output is from System.Memory v4.5.4. AssemblyFileVersion: 4.6.28619.01. AssemblyVersion: 4.0.1.1.
This is probably happening if you are referencing System.Memory nuget package directly. If you do have a direct package reference to System.Memory, then you need to upgrade it.
If you were using SDK styled projects, you would get an error preventing this from happening. But you should still be getting a build warning about version conflicts detected.
I have a console program that has two direct dependencies: ClosedXML v0.97 and ClosedXML.Report 0.2.4. The ClosedXML.Report dependency also depends on ClosedXML, but in a version 0.95.
When I try to compile the program in NET6 (basically only a reference to a class in the ClosedXml.Report),
_ = new XLTemplate(new System.IO.MemoryStream());
I get a compiler error
CS0012 The type 'IXLWorkbook' is defined in an assembly that is not referenced. You must add a reference to assembly 'ClosedXML, Version=0.95.0.0, Culture=neutral, PublicKeyToken=null'.
Why doesn't csc.exe recognize the 0.97 version to use and requests 0.95 (the indirect dependency)? The assembly version of package is same as the nuget version.
Nuget uses direct-dependency-wins mechanism and I though .net core also uses that for assemlby resolution. Is a mechanism different? How does roslyn resolve which version to use and when to throw an error?
Relevant piece of MSBuild
C:\Program Files\Microsoft Visual Studio\2022\Community\MSBuild\Current\Bin\Roslyn\csc.exe
/reference:C:\Users\username\.nuget\packages\closedxml\0.97.0\lib\netstandard2.0\ClosedXML.dll
/reference:C:\Users\username\.nuget\packages\closedxml.report\0.2.4\lib\netstandard2.0\ClosedXML.Report.dll
One possible explanation for this behavior would be if IXLWorkbook, which is apparently required by the call to new XLTemplate() no longer exists in Version 0.97 of ClosedXML.
If possible, try to rebuild ClosedXML.Report with ClosedXML 0.97. Since these apparently are early versions (Version < 1.0) breaking changes between versions seem possible. Also, can you make sure that the output bin directory actually contains Version 0.97?
I'm using these pacakges:
PackageReference Include="Polly" Version="7.2.2"
PackageReference Include="Polly.Caching.Memory" Version="3.0.2"
I have a testproject that uses these packages and the code works.
When I try to integrate my code in an existing application with lots of other nuget packages, suddenly I get a TypeLoadException.
The method TryGet in the type Polly.Caching.Memory.MemoryCacheProvider from the assembly Polly.Caching.Memory, Version=3.0.0.0, Culture=neutral, PublicKeyToken=c8a3ffc3f8f825cc doesn't have an implementation.
I have been checking everything, but I can't find the cause of this.
The versions of Polly and Polly.Caching.Memory are aligned across all projects involved.
In the bin folder the correct version appears.
I looked at the code of the assembly and the code has an implementation for TryGet
Any suggestion on what I can do to further investigate this?
The packages were all correctly configured.
I got on the right track when I saw that the method was returning a tuple.
I figured that perhaps this second application was not using the correct versions of the same packages.
I changed :
<HintPath>..\Solutions\packages\System.ValueTuple.4.5.0\lib\net461\System.ValueTuple.dll</HintPath>
To
<HintPath>..\Solutions\packages\System.ValueTuple.4.5.0\lib\net47\System.ValueTuple.dll</HintPath>
Bingo!
I recently took a legacy WCF project with Entity Framework 4 and upgraded it to EF6 and .NET 4.0. I took the legacy Silverlight client project and upgraded as well. Problems started to arise when I added a new service reference to the upgraded WCF service. The code generated in the service reference has conflicts and will not compile.
My initial problem is that both Microsoft.Data.Services.Client and System.Data.Services.Client are part of the references…
CS0433 The type 'EntitySetAttribute' exists in both
'Microsoft.Data.Services.Client, Version=5.6.4.0, Culture=neutral,
PublicKeyToken=31bf3856ad364e35' and 'System.Data.Services.Client,
Version=5.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'
This surprises me even more when I look at the generated code, References.cs, that fails. The usage is fully qualified.
[global::System.Data.Services.Common.EntitySetAttribute("myTable")]. Apparently both assemblies use the exact same namespace.
If I remove Microsoft.Data.Services.Client I get:
Error CS1061 'myEntities4' does not contain a definition for
'DefaultResolveType' and no extension method 'DefaultResolveType'
accepting a first argument of type 'myEntities' could be found (are
you missing a using directive or an assembly reference?)
If I remove System.Data.Services.Client I get:
Could not load file or assembly 'System.Data.Services.Client,
Version=5.0.5.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35' or
one of its dependencies. The system cannot find the file specified.
This error is found in the XAML of a UserControl that uses a RadDataServiceDataSource.DataServiceContext.
I have spent quite a few hours trying several different paths including:
Getting older versions of Microsoft.Data.Services.Client from NuGet.
Using only one of the references, as mentioned above.
Changing the references in the WCF service before adding the Service Reference in the client.
Attempting advanced options when adding the Service Reference
Reuse all type from assemblies.
Reuse types in specified referenced assmeblies.
I have read the following posts, but they did not help:
Microsoft.Data.Services.Client.dll vs System.Data.Services.Client.dll
WCF error: Need to exclude all but one of the following types. Only matching types can be valid references
Project does not build after updating a service reference
I'm now considering building a new WCF and Web project to work around these issues. This should be an lengthy undertaking as well, and hopefully not a red herring.
Is this an artifact of upgrading from older versions of Silverlight, WCF, Entity Framework, or .NET in general? Please help me if you know what this is, or you have seen this before. A complete rewrite of the project to another platform is not an option unfortunately.
you can use this code :
EFContext.Configuration.ProxyCreationEnabled = false;
EFContext.Configuration.LazyLoading = false;
I have a scenario like this:
I'm using interceptor to catch calls to a class that is inside assembly (let's call it Feature) that is referenced by main project. Assembly Feature is installed by NuGet (it's not public but our internal one) and has reference to another assembly (let's call it Core). Main project is referencing assembly Core as well. Core contains class definition that is used as an argument type of one of the intercepted methods.
It all works fine as long as Main project and Feature are referencing the same version of Core library. Problem arises when this versions are different and intercepted method uses types from Core as a method arguments.
In this situation, an exception is thrown that states A strongly-named assembly is required.:
[FileLoadException: Could not load file or assembly 'Core, Version=0.2.2.30, Culture=neutral, PublicKeyToken=null' or one of its dependencies. A strongly-named assembly is required. (Exception from HRESULT: 0x80131044)]
Castle.Proxies.Invocations.IBasketService_Update.InvokeMethodOnTarget() +0
Castle.DynamicProxy.AbstractInvocation.Proceed() +116
Project.Basket.BasketServiceUpdatedInterceptor.Intercept(IInvocation invocation) in c:\(...)\Basket\BasketServiceUpdatedInterceptor.cs:20
Castle.DynamicProxy.AbstractInvocation.Proceed() +604
Castle.Proxies.IBasketServiceProxy.Update(ProductId productId, UInt16 quantity) +210 (...)
Where version of Core 0.2.2.30 is a version that assembly Feature is expecting, main project is using for example version 0.2.2.31. Castle DynamicProxy is not able to find Core with version 0.2.2.30 and that's right because this exact assembly is not deployed to bin folder.
Please note that different versions of Core are a situation perfectly normal in our scenario. Feature assembly is expecting version higher than specified - not exact version.
I'm not sure whether DynamicProxy should be less rigid in it's assembly expectations are I do have to accept this limitation. I've written simple proxy class to overcome this problem so it does not block me anymore yet it blocks us from using DynamicProxy in our solutions.
The problem is caused by the fact that DP was generated against a signed assembly and then an unsigned version of the assembly is being used.
The solution is either to ensure that you use signed assembly in both cases, or to force DynamicProxy to only generate unsigned assembly.