Nswag: TypeLoadException: Could not load type TaskAwaiter from System.Runtime

Created on 5 Sep 2017 · 14Comments · Source: RicoSuter/NSwag

I am trying to generate a CSharp client for my asp.net core Web Api project. I added the "PublishWithAspNetCoreTargetManifest>false" to the csproj, which didnt work and then I compiled self contained via CLI. When generating output I get the following exception however:

Could not load type 'System.Runtime.CompilerServices.TaskAwaiter`1' from assembly 'System.Runtime, Version=4.0.0.0, Culture...

Server stack trace:
at System.Reflection.CustomAttribute._CreateCaObject(RuntimeModule pModule, IRuntimeMethodInfo pCtor, Byte* ppBlob, Byte pEndBlob, Int32* pcNamedArgs)
at System.Reflection.CustomAttribute.CreateCaObject(RuntimeModule module, IRuntimeMethodInfo ctor, IntPtr& blob, IntPtr blobEnd, Int32& namedArgs)
at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, Int32 pcaCount, RuntimeType attributeFilterType, Boolean mustBeInheritable, IList derivedAttributes, Boolean isDecoratedTargetSecurityTransparent)
at System.Reflection.CustomAttribute.GetCustomAttributes(RuntimeMethodInfo method, RuntimeType caType, Boolean inherit)
at System.Attribute.GetCustomAttributes(MemberInfo element, Boolean inherit)
at NSwag.SwaggerGeneration.WebApi.WebApiToSwaggerGenerator.<>c.b__14_1(MethodInfo m)
at System.Linq.Enumerable.<>c__DisplayClass6_01.<CombinePredicates>b__0(TSource x) at System.Linq.Enumerable.WhereArrayIterator1.MoveNext()
at NSwag.SwaggerGeneration.WebApi.WebApiToSwaggerGenerator.d__11.MoveNext()

Whats up here?

NSwag.AssemblyLoader bug

Source

zuckerthoben

All 14 comments

Can you provide a reproduction sample project?

RicoSuter on 5 Sep 2017

See https://github.com/RSuter/NSwag/wiki/Assembly-loading#troubleshooting

RicoSuter on 5 Sep 2017

When I try to add the assembly that fails to load into the ".NET Assembly Paths" as described in the troubleshooting, I get the following error:

Could not load file or assembly or one of its dependencies. Strong name signature could not be verified. The assembly may have been tampered with ...

Tried with: C:\Users\\source\repos\BlobApiTest\BlobApiTest\bin\Debug\netcoreapp2.0\win10-x64\publish\System.Runtime.dll

EDIT: It goes away when selecting the .dll from the .net core installation. The original error still occurs then.

Here is the sample project: https://www.file-upload.net/download-12696327/BlobApiTest.zip.html

zuckerthoben on 6 Sep 2017

With NSwag.NPM it works when using the .NET Core binaries:

 nswag run nswag.json /runtime:core2.0

With this config in the project directory:

nswag.zip

But this is not a solution - I'd like this to work also with a full .NET process...

RicoSuter on 7 Sep 2017

Ok, I will try that. Can I generate the client with code instead of the GUI? Will it also crash?
Do you know what the issue is?
I know that it worked with a blank solution. After I added some packages and logic, I started getting errors.

zuckerthoben on 7 Sep 2017

The problem is that NSwagStudio always generates in the same process in a seperate AppDomain (full .NET) with the command line (NSwag.NPM) you also have binaries for .NET Core and you can generate in a .NET Core process, which works...

The question is whether it makes sense to search for solutions to generate .NET Core assemblies in a full .NET process/AppDomain or if we should just refactor NSwagStudio so that it internally uses the one of the runtime specific command line exes (full .net, core...)

RicoSuter on 7 Sep 2017

With these settings:

You can use the UI to configure, save the "nswag.json" file and run the command line .NET core binary against it:

 nswag run nswag.json /runtime:core2.0

this works.

But id like a solution which works out of the box - in all scenarios :). But with all these different frameworks it might be a bit tricky...

RicoSuter on 7 Sep 2017

Btw: With these settings I can now load the controller names (see screenshots) but generation gives mit this error:

'Could not load type 'System.Object' from assembly 'System.Private.CoreLib, Version=4.0.0.0, Culture=neutral, PublicKeyToken=7cec85d7bea7798e' because the parent does not exist.'

same as https://github.com/RSuter/NSwag/issues/918

but only if I remove the NSwag.Annotations binding redirect: