Could not load file or assembly 'Microsoft.OpenApi'... while using Swashbuckle.AspNetCore.Cli

user_93277 0
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I'm getting the subject error message while using the sample MS PowerShell script from the article Generating API clients using AutoRest when the following command line

dotnet swagger "tofile" --output "../../res/swagger.json" "../Sample.Api/bin/Debug/netcoreapp2.1/Sample.Api.dll" v1

is executed. Solution?

FYI: Swashbuckle.AspNetCore.Cli entry source code is located here: Swashbuckle.AspNetCore/src/Swashbuckle.AspNetCore.Cli/Program.cs

UPDATE

I should have posted the full text of runtime error message - here it is:

At C:\Tests\Swashbuckle\build.ps1:8 char:1
+ dotnet swagger "tofile" --output "../../res/swagger.json" "../Sample. ...
+ ~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
+ CategoryInfo          : NotSpecified: (:String) [], RemoteException
+ FullyQualifiedErrorId : NativeCommandError

Unhandled Exception:

System.IO.FileNotFoundException: Could not load file or assembly 'Microsoft.OpenApi, 
     Version=1.1.1.0, Culture=neutral, PublicKeyToken=3f5743946376f042'. 
     The system cannot find the file specified.
at Swashbuckle.AspNetCore.Cli.Program.<>c.<Main>b__0_3(IDictionary`2 namedArgs)
at Swashbuckle.AspNetCore.Cli.CommandRunner.Run(IEnumerable`1 args)
at Swashbuckle.AspNetCore.Cli.CommandRunner.Run(IEnumerable`1 args)
at Swashbuckle.AspNetCore.Cli.Program.Main(String[] args)
asp.net-core-2.0 assembly-loading dependencies reflection c#
2 Answers

I have used the following to get rid of this issue.

Upgraded swagger to 5.0.0-rc3, my csproj looks like this 

  <ItemGroup>
    <PackageReference Include="Microsoft.AspNetCore.App" />
    <PackageReference Include="Swashbuckle.AspNetCore" Version="5.0.0-rc3" />
  </ItemGroup>

Then I installed the swagger cli using following code as you must have installed

dotnet tool install -g swashbuckle.aspnetcore.cli --version 5.0.0-rc3

And finally running the command 

swagger "tofile" --output "../../res/swagger.json" "../Sample.Api/bin/Debug/netcoreapp2.1/Sample.Api.dll" v1

make sure you have swagger in your path after running the above command.

user_17733540

The issue solved by referencing v.4.0.1 (or v.5.0.0-beta) of Swashbuckle.AspNetCore and Swashbuckle.AspNetCore.Annotations packages and of Swashbuckle.AspNetCore.Cli tool:

...
<ItemGroup>
  <PackageReference Include="Microsoft.AspNetCore.App" />
   <PackageReference Include="Swashbuckle.AspNetCore" Version="4.0.1" />
   <PackageReference Include="Swashbuckle.AspNetCore.Annotations" Version="4.0.1" />
</ItemGroup>

 <ItemGroup>
    <DotNetCliToolReference Include="Swashbuckle.AspNetCore.Cli" Version="4.0.1" />
 </ItemGroup>
user_932770
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