Incompatibility with a pure Orleans client

[Tragetaschen]

I have a "pure" Orleans client project (referencing only Microsoft.Orleans.Client and Orleans.Clustering.Kubernetes) that is setup with UseKubeGatewayListProvider(). When I run this project, I get an exception

Exception

Could not load file or assembly 'Orleans.Runtime, Culture=neutral, PublicKeyToken=null'. The system cannot find the file specified.
   at System.Reflection.RuntimeAssembly.<InternalLoad>g____PInvoke|48_0(NativeAssemblyNameParts* __pAssemblyNameParts_native, ObjectHandleOnStack __requestingAssembly_native, StackCrawlMarkHandle __stackMark_native, Int32 __throwOnFileNotFound_native, ObjectHandleOnStack __assemblyLoadContext_native, ObjectHandleOnStack __retAssembly_native)
   at System.Reflection.RuntimeAssembly.<InternalLoad>g____PInvoke|48_0(NativeAssemblyNameParts* __pAssemblyNameParts_native, ObjectHandleOnStack __requestingAssembly_native, StackCrawlMarkHandle __stackMark_native, Int32 __throwOnFileNotFound_native, ObjectHandleOnStack __assemblyLoadContext_native, ObjectHandleOnStack __retAssembly_native)
   at System.Reflection.RuntimeAssembly.InternalLoad(AssemblyName assemblyName, StackCrawlMark& stackMark, AssemblyLoadContext assemblyLoadContext, RuntimeAssembly requestingAssembly, Boolean throwOnFileNotFound) in /_/src/runtime/src/coreclr/System.Private.CoreLib/src/System/Reflection/RuntimeAssembly.cs:line 385
   at System.Runtime.Loader.AssemblyLoadContext.LoadFromAssemblyName(AssemblyName assemblyName) in /_/src/runtime/src/libraries/System.Private.CoreLib/src/System/Runtime/Loader/AssemblyLoadContext.cs:line 327
   at Orleans.Serialization.Internal.ReferencedAssemblyProvider.<GetApplicationPartAssemblies>g__ExpandAssembly|5_3(HashSet`1 assemblies, Assembly assembly) in /_/src/Orleans.Serialization/Hosting/ReferencedAssemblyProvider.cs:line 220
   at Orleans.Serialization.Internal.ReferencedAssemblyProvider.<GetApplicationPartAssemblies>g__ExpandAssembly|5_3(HashSet`1 assemblies, Assembly assembly) in /_/src/Orleans.Serialization/Hosting/ReferencedAssemblyProvider.cs:line 226
   at Orleans.Serialization.Internal.ReferencedAssemblyProvider.<GetApplicationPartAssemblies>g__ExpandApplicationParts|5_1(IEnumerable`1 assemblies) in /_/src/Orleans.Serialization/Hosting/ReferencedAssemblyProvider.cs:line 198
   at Orleans.Serialization.Internal.ReferencedAssemblyProvider.GetApplicationPartAssemblies(Assembly assembly) in /_/src/Orleans.Serialization/Hosting/ReferencedAssemblyProvider.cs:line 176
   at Orleans.Serialization.Internal.ReferencedAssemblyProvider.AddAssembly(HashSet`1 parts, Assembly assembly) in /_/src/Orleans.Serialization/Hosting/ReferencedAssemblyProvider.cs:line 54
   at Orleans.Serialization.Internal.ReferencedAssemblyProvider.AddFromDependencyContext(HashSet`1 parts, Assembly assembly) in /_/src/Orleans.Serialization/Hosting/ReferencedAssemblyProvider.cs:line 108
   at Orleans.Serialization.Internal.ReferencedAssemblyProvider.GetRelevantAssemblies() in /_/src/Orleans.Serialization/Hosting/ReferencedAssemblyProvider.cs:line 20
   at Orleans.Serialization.ServiceCollectionExtensions.AddSerializer(IServiceCollection services, Action`1 configure) in /_/src/Orleans.Serialization/Hosting/ServiceCollectionExtensions.cs:line 40
   at Orleans.DefaultClientServices.AddDefaultServices(IClientBuilder builder) in /_/src/Orleans.Core/Core/DefaultClientServices.cs:line 130
   at Orleans.Hosting.ClientBuilder..ctor(IServiceCollection services, IConfiguration configuration) in /_/src/Orleans.Core/Core/ClientBuilder.cs:line 21
   at Microsoft.Extensions.Hosting.OrleansClientGenericHostExtensions.AddOrleansClient(IServiceCollection services, IConfiguration configuration) in /_/src/Orleans.Core/Hosting/OrleansClientGenericHostExtensions.cs:line 204
   at Microsoft.Extensions.Hosting.OrleansClientGenericHostExtensions.AddOrleansClient(IServiceCollection services, Action`1 configureDelegate) in /_/src/Orleans.Core/Hosting/OrleansClientGenericHostExtensions.cs:line 161
   at …ConfigureServices(IServiceCollection services) in C:\Users\…
…

when Orleans internally tries to load the assemblies "referenced" by the `ApplicationPart` attributes within OCK.dll.

This needs to be carefully set up, as any Orleans dependency that includes the runtime might have placed the runtime assembly in the output folder already, making it Assembly.Load'able.

It looks like this is an artifact of the code generators in the Orleans SDK maybe being a bit overzealous and OCK not depending on the runtime externally (PrivateAssets="All"). I wonder if the generators can/should be turned off.

As a workaround, I have included a Microsoft.Orleans.Runtime reference in my project.

[AndersRasmussen]

Can confirm the same behavior when using Microsoft.Orleans.Client only.
Running 10.0.1
Temporary workaround with including Microsoft.Orleans.Runtime works.