"library.dll does not contain an entry point" error when using "TargetFrameworks" vs "TargetFramework"

[ghost]

Creating a dll using .net core 3.1
Reference: Swashbuckle.AspNetCore Version=5.0.0

Build -> compiles succesfully

Change: <TargetFramework>netcoreapp3.1</TargetFramework>
To: <TargetFrameworks>netcoreapp3.1;</TargetFrameworks>
Or What i'm using: <TargetFrameworks>netcoreapp3.1;netstandard2.0;net461;</TargetFrameworks>

Compile -> failure, two errors:
"library.dll does not contain an entry point"
"The command "dotnet "blah\microsoft.extensions.apidescription.server\3.0.0\build/../tools/dotnet-getdocument.dll" --assembly "library.dll" --file-list "obj\library.OpenApiFiles.cache" --framework ".NETCoreApp,Version=v3.1" --output "obj" --project "library" --assets-file "library\obj\project.assets.json" --platform "AnyCPU" " exited with code 3."

I found that that comand does not run when using just TargetFramework.

There is a workaround: underneath add false

But this doesn't seem like the expected requirement

[gloriali2011]

Hi there, I have the same issue, did you find out the root cause and ways to fix the error? Thank you!

[SonicGD]

I have same problem when cross-target library to 3.1 and 5.0

<TargetFrameworks>netcoreapp3.1;net5.0</TargetFrameworks>

Adding

<OpenApiGenerateDocumentsOnBuild>false</OpenApiGenerateDocumentsOnBuild>

helps.

[domaindrivendev]

@andrewmcclellankibo are you still experiencing this problem with the latest version of SB (5.6.3 at time of writing)? If so, please create a minimal app (i.e. starting from empty project) that repro's the issue and post to github so I can pull it down and troubleshoot. Thx

[liuyongtao]

I have the same problem

[aliabusaleh]

I faced the same problem when I was targeting net461, check this #1967 it might help.

[domaindrivendev]

SB doesn't currently support apps that target net461 but not sure if that's the OP's issue. If this is happening for other targets then I need someone to create a minimal app that repro's it and post to github where I can pull down and troubleshoot. I'm going to close the issue until someone provides that.

[jonathh21]

I've got this - targeting core 3.1 and .net 5

[ravimittal84]

Add this to your csproj

<OpenApiGenerateDocuments>false</OpenApiGenerateDocuments>

Update: Apparently it disables the swagger documentation, so it may not help.

[jonclare]

I came across the same issue when attempting to multi-target .NET 5.0 and 6.0
@domaindrivendev, I've created a minimal solution that reproduces the issue here: https://github.com/jonclare/SwashbuckleBuildErrors

Can you re-open this issue?

[wsaeed]

I came across the same issue when attempting to multi-target .NET 5.0 and 6.0 @domaindrivendev, I've created a minimal solution that reproduces the issue here: https://github.com/jonclare/SwashbuckleBuildErrors

Can you re-open this issue?

I'm also experiencing the same issue when multi-targeting .net 5 and .net 6.

[Meandron]

I have the same issue

[GitBasse]

I'm also getting this error with Framework Version 4.8

[ben-page]

@domaindrivendev Hi, here's an example of the problem using .NET Core 6 & 7. The build works with TargetFramework, but not TargetFrameworks. Can you reopen this issue?

https://github.com/ben-page/SwashbuckleMultiTargetError