Could not load Newtonsoft.Json V9.0.0.0 on latest Google.Apis.YouTube.v3 1.16.0.582

When using the latest YouTube v3 client library (Google.Apis.YouTube.v3) in a .NET 4.6.1 project.json app I get the following exception on runtime:

Exception Details

System.IO.FileLoadException occurred FileName=Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed FusionLog==== Pre-bind state information === LOG: DisplayName = Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed (Fully-specified) LOG: Appbase = file:///C:/Dev/Repositories/YouCast/Source/YouCast/bin/Debug/ LOG: Initial PrivatePath = NULL

Calling assembly : Google.Apis.YouTube.v3, Version=1.16.0.582, Culture=neutral, PublicKeyToken=4b01fa6e34db77ab.

LOG: This bind starts in default load context. LOG: Using application configuration file: C:\Dev\Repositories\YouCast\Source\YouCast\bin\Debug\YouCast.vshost.exe.config LOG: Using host configuration file: LOG: Using machine configuration file from C:\Windows\Microsoft.NET\Framework\v4.0.30319\config\machine.config. LOG: Post-policy reference: Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed LOG: Attempting download of new URL file:///C:/Dev/Repositories/YouCast/Source/YouCast/bin/Debug/Newtonsoft.Json.DLL. WRN: Comparing the assembly name resulted in the mismatch: Major Version ERR: Failed to complete setup of assembly (hr = 0x80131040). Probing terminated.

HResult=-2146234304 Message=Could not load file or assembly ‘Newtonsoft.Json, Version=9.0.0.0, Culture=neutral, PublicKeyToken=30ad4fe6b2a6aeed’ or one of its dependencies. The located assembly’s manifest definition does not match the assembly reference. (Exception from HRESULT: 0x80131040) Source=mscorlib StackTrace: at System.ModuleHandle.ResolveType(RuntimeModule module, Int32 typeToken, IntPtr* typeInstArgs, Int32 typeInstCount, IntPtr* methodInstArgs, Int32 methodInstCount, ObjectHandleOnStack type) at System.ModuleHandle.ResolveTypeHandleInternal(RuntimeModule module, Int32 typeToken, RuntimeTypeHandle[] typeInstantiationContext, RuntimeTypeHandle[] methodInstantiationContext) at System.Reflection.RuntimeModule.ResolveType(Int32 metadataToken, Type[] genericTypeArguments, Type[] genericMethodArguments) at System.Reflection.CustomAttribute.FilterCustomAttributeRecord(CustomAttributeRecord caRecord, MetadataImport scope, Assembly& lastAptcaOkAssembly, RuntimeModule decoratedModule, MetadataToken decoratedToken, RuntimeType attributeFilterType, Boolean mustBeInheritable, Object[] attributes, IList derivedAttributes, RuntimeType& attributeType, IRuntimeMethodInfo& ctor, Boolean& ctorHasParameters, Boolean& isVarArg) at System.Reflection.CustomAttribute.IsCustomAttributeDefined(RuntimeModule decoratedModule, Int32 decoratedMetadataToken, RuntimeType attributeFilterType, Int32 attributeCtorToken, Boolean mustBeInheritable) at System.Reflection.CustomAttribute.IsDefined(RuntimePropertyInfo property, RuntimeType caType) at System.Reflection.RuntimePropertyInfo.IsDefined(Type attributeType, Boolean inherit) at Newtonsoft.Json.Serialization.DefaultContractResolver.GetSerializableMembers(Type objectType) at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateProperties(Type type, MemberSerialization memberSerialization) at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateObjectContract(Type objectType) at Newtonsoft.Json.Serialization.DefaultContractResolver.CreateContract(Type objectType) at Newtonsoft.Json.Serialization.DefaultContractResolver.ResolveContract(Type type) at Newtonsoft.Json.Serialization.JsonSerializerInternalReader.Deserialize(JsonReader reader, Type objectType, Boolean checkAdditionalContent) at Newtonsoft.Json.JsonSerializer.DeserializeInternal(JsonReader reader, Type objectType) at Newtonsoft.Json.JsonConvert.DeserializeObject(String value, Type type, JsonSerializerSettings settings) at Newtonsoft.Json.JsonConvert.DeserializeObject[T](String value, JsonSerializerSettings settings) at Google.Apis.Json.NewtonsoftJsonSerializer.Deserialize[T](String input) in C:\Users\cloudsharp\Documents\GitHub\google-api-dotnet-client\Src\Support\GoogleApis.Core\Apis\Json\NewtonsoftJsonSerializer.cs:line 124 at Google.Apis.Services.BaseClientService.<DeserializeResponse>d__331.MoveNext() in C:\Users\cloudsharp\Documents\GitHub\google-api-dotnet-client\Src\Support\GoogleApis\Apis\Services\BaseClientService.cs:line 265 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Google.Apis.Requests.ClientServiceRequest1.<ParseResponse>d__27.MoveNext() in C:\Users\cloudsharp\Documents\GitHub\google-api-dotnet-client\Src\Support\GoogleApis\Apis\Requests\ClientServiceRequest.cs:line 0 — End of stack trace from previous location where exception was thrown — at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Google.Apis.Requests.ClientServiceRequest1.<ExecuteAsync>d__23.MoveNext() in C:\Users\cloudsharp\Documents\GitHub\google-api-dotnet-client\Src\Support\GoogleApis\Apis\Requests\ClientServiceRequest.cs:line 0 --- End of stack trace from previous location where exception was thrown --- at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at Google.Apis.Requests.ClientServiceRequest1.<ExecuteAsync>d__22.MoveNext() in C:\Users\cloudsharp\Documents\GitHub\google-api-dotnet-client\Src\Support\GoogleApis\Apis\Requests\ClientServiceRequest.cs:line 0 — End of stack trace from previous location where exception was thrown — at System.Runtime.CompilerServices.TaskAwaiter.ThrowForNonSuccess(Task task) at System.Runtime.CompilerServices.TaskAwaiter.HandleNonSuccessAndDebuggerNotification(Task task) at System.Runtime.CompilerServices.TaskAwaiter`1.GetResult() at Service.YoutubeFeed.<GetUserFeedAsync>d__5.MoveNext() in C:\Dev\Repositories\YouCast\Source\Service\YoutubeFeed.cs:line 60 InnerException:

The lowest call is Google.Apis.Json.NewtonsoftJsonSerializer.Deserialize in the Google.Apis.Core package. By looking at the nuspec I see that .NET Standard gets v9 but the rest get v7 so I assume I get the package requiring v7 but the assemblies inside it actually require v9.

[i3arnon]

Works great. Thanks 😃

[chrisdunelm]

This is really unfortunate. Using the “Get Nearest Framework” tool it appears that netstandard1.3 is the preferred choice given the targets contained in our packages. I suspect we may need to add an “net45” (or possibly “net46”) target, both of which I’ve just verified is then used when targeting net46[1]. So yes, net461 is currently borked. I’ll start work now on a new release with a fix.