Placeholder in exception is not filled out

[abatishchev]

Here's an exception I'm getting:

[INFO] [35]   Error Message:
[INFO] [36]    Test method Throttle.Client.Tests.ThrottleClientTests.TestLocalAggregationClient threw exception: 
[INFO] [37] System.ArgumentException: Type to mock ({0}) must be an interface, a delegate, or a non-sealed, non-static class. ---> System.TypeLoadException: Method 'RemoveExpiredIdentifiers' on type 'Castle.Proxies.LocalAggregationClientProxy' from assembly 'DynamicProxyGenAssembly2, Version=0.0.0.0, Culture=neutral, PublicKeyToken=a621a9e7e5c32e69' is overriding a method that is not visible from that assembly.
[INFO] [38]   Stack Trace:
[INFO] [39]       at System.Reflection.Emit.TypeBuilder.TermCreateClass(RuntimeModule module, Int32 tk, ObjectHandleOnStack type)
[INFO] [40]    at System.Reflection.Emit.TypeBuilder.CreateTypeNoLock()
[INFO] [41]    at System.Reflection.Emit.TypeBuilder.CreateTypeInfo()
[INFO] [42]    at Castle.DynamicProxy.Generators.Emitters.AbstractTypeEmitter.CreateType(TypeBuilder type)
[INFO] [43]    at Castle.DynamicProxy.Generators.Emitters.AbstractTypeEmitter.BuildType()
[INFO] [44]    at Castle.DynamicProxy.Generators.ClassProxyGenerator.GenerateType(String name, Type[] interfaces, INamingScope namingScope)
[INFO] [45]    at Castle.Core.Internal.SynchronizedDictionary`2.GetOrAdd(TKey key, Func`2 valueFactory)
[INFO] [46]    at Castle.DynamicProxy.Generators.BaseProxyGenerator.ObtainProxyType(CacheKey cacheKey, Func`3 factory)
[INFO] [47]    at Castle.DynamicProxy.ProxyGenerator.CreateClassProxy(Type classToProxy, Type[] additionalInterfacesToProxy, ProxyGenerationOptions options, Object[] constructorArguments, IInterceptor[] interceptors)
[INFO] [48]    at Moq.CastleProxyFactory.CreateProxy(Type mockType, IInterceptor interceptor, Type[] interfaces, Object[] arguments) in C:\projects\moq4\src\Moq\Interception\CastleProxyFactory.cs:line 62
[INFO] [49] --- End of inner exception stack trace ---
[INFO] [50]     at Moq.CastleProxyFactory.CreateProxy(Type mockType, IInterceptor interceptor, Type[] interfaces, Object[] arguments) in C:\projects\moq4\src\Moq\Interception\CastleProxyFactory.cs:line 66
[INFO] [51]    at Moq.Mock`1.InitializeInstance() in C:\projects\moq4\src\Moq\Mock`1.cs:line 304
[INFO] [52]    at Moq.Mock`1.OnGetObject() in C:\projects\moq4\src\Moq\Mock`1.cs:line 326
[INFO] [53]    at Moq.Mock`1.get_Object() in C:\projects\moq4\src\Moq\Mock`1.cs:line 281
[INFO] [54]    at ClientTests.TestLocalAggregationClient() in C:\source\src\ThrottleClientTests.cs:line 1251
[INFO] [55] Results File: C:\source\TestResults\ContainerAdministrator_656F1E5836B3_2022-03-20_23_04_12.trx

Note the placeholder {0} that wasn't filled out a value:

System.ArgumentException: Type to mock ({0}) must be an interface, a delegate, or a non-sealed, non-static class