Swashbuckle.AspNetCore not working with new release of .netcore 3.0 as of 09/25

[danielPollackGitHub]

Runtime exception on IWebHostBuilder CreateWebHostBuilder(string[] args):

An error occurred while starting the application.
MissingMethodException: Method not found: 'Void Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware..ctor(Microsoft.AspNetCore.Http.RequestDelegate, Microsoft.AspNetCore.Hosting.IHostingEnvironment, Microsoft.Extensions.Options.IOptions`1, Microsoft.Extensions.Logging.ILoggerFactory)'.
Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.CreateStaticFileMiddleware(RequestDelegate next, IHostingEnvironment hostingEnv, ILoggerFactory loggerFactory, SwaggerUIOptions options)

MissingMethodException: Method not found: 'Void Microsoft.AspNetCore.StaticFiles.StaticFileMiddleware..ctor(Microsoft.AspNetCore.Http.RequestDelegate, Microsoft.AspNetCore.Hosting.IHostingEnvironment, Microsoft.Extensions.Options.IOptions`1, Microsoft.Extensions.Logging.ILoggerFactory)'.
Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware.CreateStaticFileMiddleware(RequestDelegate next, IHostingEnvironment hostingEnv, ILoggerFactory loggerFactory, SwaggerUIOptions options)
Swashbuckle.AspNetCore.SwaggerUI.SwaggerUIMiddleware..ctor(RequestDelegate next, IHostingEnvironment hostingEnv, ILoggerFactory loggerFactory, SwaggerUIOptions options)
System.RuntimeMethodHandle.InvokeMethod(object target, object[] arguments, Signature sig, bool constructor, bool wrapExceptions)
System.Reflection.RuntimeConstructorInfo.Invoke(BindingFlags invokeAttr, Binder binder, object[] parameters, CultureInfo culture)
Microsoft.Extensions.Internal.ActivatorUtilities+ConstructorMatcher.CreateInstance(IServiceProvider provider)
Microsoft.Extensions.Internal.ActivatorUtilities.CreateInstance(IServiceProvider provider, Type instanceType, object[] parameters)
Microsoft.AspNetCore.Builder.UseMiddlewareExtensions+<>c__DisplayClass4_0.b__0(RequestDelegate next)
Microsoft.AspNetCore.Builder.ApplicationBuilder.Build()
Microsoft.AspNetCore.Hosting.WebHost.BuildApplication()
Microsoft.AspNetCore.Hosting.WebHost.StartAsync(CancellationToken cancellationToken)
Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, string startupMessage)
Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token, string startupMessage)
Microsoft.AspNetCore.Hosting.WebHostExtensions.RunAsync(IWebHost host, CancellationToken token)
Microsoft.AspNetCore.Hosting.WebHostExtensions.Run(IWebHost host)
WebAPIApplication.Program.Main(string[] args) in Program.cs
+
CreateWebHostBuilder(args).Build().Run();

[denisulmer]

I can second this, upgrade to .NET Core 3.0 (ASP.NET Core) yesterday and I am facing the same issue.

[julre]

I had the same issue with Swashbuckle.AspNetCore 4.0.0. Upgrade to 5.0.0.-rc3 solved it.

[denisulmer]

I had the same issue with Swashbuckle.AspNetCore 4.0.0. Upgrade to 5.0.0.-rc3 solved it.

It might fix the issue but it also introduces breaking changes. No solution to the issue from my point of view.

[drikusvd]

5.0.0-rc3 is still referencing Microsoft.Extensions.ApiDescription.Server (>= 0.3.0-preview7.19365.7) which is still Preview7 and not 3.0.0. Unfortunately this introduces conflicts on my side and cannot work.

[SarcoZ]

In net core 3.0,I had the same issue with Swashbuckle.AspNetCore 4.0.0. Upgrade to 5.0.0.-rc3 can not solved it.

[samsmithnz]

I actually found .NET Core 3.0 didn't work with rc3, but did with rc2. I recommend you try rc2.

[domaindrivendev]

Could someone on this thread please put together a minimal application (from scratch) that repro's the issue and post it on GitHub. I have lots of examples (and tests) of rc3 working with .NET Core 3.0 so _just_ saying it doesn't work isn't particularly helpful in terms of finding a solution. If someone posts the minimal repro application, then I'll take a look and maybe we can get somewhere. Thanks

[samsmithnz]

To clarify, I received the error originally posted above. I was upgrading a web api app from ASP.NET Core 2.2 to ASP.NET Core 3.0, not sure if that is related. I do not have time to create a repro until Saturday or Sunday...

[nphmuller]

@drikusvd Referencing version 3.0.0 of Microsoft.Extensions.ApiDescription.Server manually in your csproj file should resolve the issue of conflicts. As far as I can tell (been doing this a couple of days) Swashbuckle is completely compatible with this version. (3.0.0 also gives far better build errors then preview 7, so that's nice too)

[vbulkin]

@drikusvd, @nphmuller
Confirming that directly referencing version 3.0.0 of Microsoft.Extensions.ApiDescription.Server in a project resolves this issue:

5.0.0-rc3 is still referencing Microsoft.Extensions.ApiDescription.Server (>= 0.3.0-preview7.19365.7) which is still Preview7 and not 3.0.0. Unfortunately this introduces conflicts on my side and cannot work.

@drikusvd Referencing version 3.0.0 of Microsoft.Extensions.ApiDescription.Server manually in your csproj file should resolve the issue of conflicts. As far as I can tell (been doing this a couple of days) Swashbuckle is completely compatible with this version. (3.0.0 also gives far better build errors then preview 7, so that's nice too)

[juan-carlos-diaz]

Could someone on this thread please put together a minimal application (from scratch) that repro's the issue and post it on GitHub. I have lots of examples (and tests) of rc3 working with .NET Core 3.0 so _just_ saying it doesn't work isn't particularly helpful in terms of finding a solution. If someone posts the minimal repro application, then I'll take a look and maybe we can get somewhere. Thanks

Here

[martinmoose]

I get this. I don't know if it's the same as the others.
Repro steps:
1) Create a new API template project in VS 2019 pro16.3.1.
2) In the pm console type: Install-Package Swashbuckle.AspNetCore -Version 5.0.0-rc3

3) Run

Severity Code Description Project File Line Suppression State
Error MSB3073 The command "dotnet "C:\Users\XXXX.nuget\packages\microsoft.extensions.apidescription.server\0.3.0-preview7.19365.7\build\/../tools/dotnet-getdocument.dll" --assembly "C:\Users\XXXX\source\repos\SwashBuckleExample\SwashBuckleExample\bin\Debug\netcoreapp3.0\SwashBuckleExample.dll" --file-list "obj\SwashBuckleExample.OpenApiFiles.cache" --framework ".NETCoreApp,Version=v3.0" --output "obj" --project "SwashBuckleExample" --assets-file "C:\Users\XXXX\source\repos\SwashBuckleExample\SwashBuckleExample\obj\project.assets.json" --platform "AnyCPU" " exited with code 6. SwashBuckleExample C:\Users\XXXX.nuget\packages\microsoft.extensions.apidescription.server\0.3.0-preview7.19365.7\buildMicrosoft.Extensions.ApiDescription.Server.targets 41

[andrew-paes]

I get this. I don't know if it's the same as the others.
Repro steps:

1. Create a new API template project in VS 2019 pro16.3.1.
2. In the pm console type: Install-Package Swashbuckle.AspNetCore -Version 5.0.0-rc3
3. Run

Severity Code Description Project File Line Suppression State
Error MSB3073 The command "dotnet "C:\Users\XXXX.nuget\packages\microsoft.extensions.apidescription.server\0.3.0-preview7.19365.7\build/../tools/dotnet-getdocument.dll" --assembly "C:\Users\XXXX\source\repos\SwashBuckleExample\SwashBuckleExample\bin\Debug\netcoreapp3.0\SwashBuckleExample.dll" --file-list "obj\SwashBuckleExample.OpenApiFiles.cache" --framework ".NETCoreApp,Version=v3.0" --output "obj" --project "SwashBuckleExample" --assets-file "C:\Users\XXXX\source\repos\SwashBuckleExample\SwashBuckleExample\obj\project.assets.json" --platform "AnyCPU" " exited with code 6. SwashBuckleExample C:\Users\XXXX.nuget\packages\microsoft.extensions.apidescription.server\0.3.0-preview7.19365.7\buildMicrosoft.Extensions.ApiDescription.Server.targets 41

I had a API template that I made just to make future projects more easy to go and it was running on Core 2.2.

Today I decided to up this to Core 3.0 also I update Swash to rc3 and now I'm expecting the following error:

Severity Code Description Project File Line Suppression State Suppression State
Error MSB3073 The command "dotnet "C:\Usersandre.nuget\packages\microsoft.extensions.apidescription.server\0.3.0-preview7.19365.7\build\/../tools/dotnet-getdocument.dll" --assembly "C:\Workspace\diretor-cash\src\Diretor.Cash\Diretor.Cash.Api\bin\Debug\netcoreapp3.0\Diretor.Cash.Api.dll" --file-list "obj\Diretor.Cash.Api.OpenApiFiles.cache" --framework ".NETCoreApp,Version=v3.0" --output "obj" --project "Diretor.Cash.Api" --assets-file "C:\Workspace\diretor-cash\src\Diretor.Cash\Diretor.Cash.Api\obj\project.assets.json" --platform "AnyCPU" " exited with code 6. Diretor.Cash.Api C:\Usersandre.nuget\packages\microsoft.extensions.apidescription.server\0.3.0-preview7.19365.7\buildMicrosoft.Extensions.ApiDescription.Server.targets 41

[Sonorpearl]

Same here. Only works with:
<OpenApiGenerateDocuments>false</OpenApiGenerateDocuments>
Related issue: https://github.com/aspnet/AspNetCore/issues/14232

[mahonecode]

Swashbuckle.AspNetCore.SwaggerGen 5.0.0-rc4 is still referencing Microsoft.AspNetCore.Mvc.NewtonsoftJson (>= 3.0.0-preview3-19153-02) which is still Preview3 and not 3.0.0.

[fredericof]

I upgrade Swashbuckle.AspNetCore 5.0.0-rc3 to rc4 and works!

[cmarrades]

Works for me as well upgrading to rc4. Just need to tweak The "Info" object from swagger to "OpenApiInfo"

[sfarmer-MesaAZ]

I also had to tweek the implementation of SwaggerDefaultValues class to accomodate the new IOperationFilter. (uses OpenApi in the same manner as the Info object @cmarrades mentions)

[kcomelli]

I encountered the same error using Swashbuckle.AspNetCore 5.0.0-rc4.
The Swashbuckle packages have been used within a class library targeting netstandard2.1 which does not seems to be supported by now ?!?

Changed the library to target netcoreapp3 solved the problem, but this is only a temporary solution

[lemarcelo]

For me the steps:

Create a new API template project in VS 2019 pro16.3.1.
In the pm console type: Install-Package Swashbuckle.AspNetCore -Version 5.0.0-rc3
Run

Make works, thanks.

[SergNikitinSharpDev]

As Swashbuckle.AspNetCore 5.x.x introduces breaking changes we would like to avoid updating from 4.x.x. Can you confirm that Swashbuckle.AspNetCore 4.x.x will not be supporting .net core >= 3.0.0 ?

[domaindrivendev]

4x will not be supporting NET Core 3.0

[jolszewskii]

Install-Package Swashbuckle.AspNetCore -Version 5.0.0-rc4

and change services to:

c.SwaggerDoc("v1", new Microsoft.OpenApi.Models.OpenApiInfo { Title = "Core API", Description = "Swagger Core API" });

[gsaucedoct]

Install package Microsoft.OpenApi and Swashbuckle.AspNetCore -Version 5.0.0-rc4:
Keep only your defined endpoints.

Running now in NET Core 3.1
https://docs.microsoft.com/en-us/aspnet/core/tutorials/getting-started-with-swashbuckle?view=aspnetcore-3.1&tabs=visual-studio

[domaindrivendev]

@danielPollackGitHub based on the thread above, can this be closed?

[domaindrivendev]

Closing due to inactivity

[rxgaur]

I used OpenApiInfo