Inconsistency in assembly versioning? (.Net Core 2.0 with .NET Standard 2 class library)

Question

So, my solution compiles, but when I run it, I get an error in the class library that works with .NET 4.6.1.

System.TypeLoadException: 'Failed to load type' System.Data.Common.DbProviderFactories' from the assembly 'System.Data, Version = 4.0.0.0, Culture = neutral, PublicKeyToken = b77a5c561934e089'.

Any suggestions?

EDIT:

Full error:

$ exception {System.TypeLoadException: Failed to load type 'System.Data.Common.DbProviderFactories' from the assembly 'System.Data, Version = 4.0.0.0, Culture = neutral, PublicKeyToken = b77a5c561934e089'. in System.Data.Entity.Infrastructure.DependencyResolution.DefaultProviderFactoryResolver.GetService (type type, object key, Func 3 handleFailedLookup)     System.Data.Entity.Infrastructure.DependencyResolution.DefaultProviderFactoryResolver.GetServices( , )     System.Collections.Concurrent.ConcurrentDictionary2.GetOrAdd (TKey key, Func 2 valueFactory)     System.Linq.Enumerable.SelectManySingleSelectorIterator2.MoveNext () in System.Linq.Enumerable.ConcatIterator 1.MoveNext()     System.Linq.Enumerable.SelectManySingleSelectorIterator2.MoveNext () in System .Linq.Enumerable.ConcatIterator 1.MoveNext()     System.Linq.Enumerable. <OfTypeIterator> d__321.MoveNext () in System.Collections.Generic.List 1.AddEnumerable(IEnumerable1 enumerable) in System.Linq.Enumerable.ToList [TSource] (IEnumerable 1 source)     System.Data.Entity.Infrastructure.DependencyResolution.InternalConfiguration.Lock()     System.Data.Entity.Infrastructure.DependencyResolution.DbConfigurationManager. <.ctor > b__1()     System.Lazy1.ViaFactory (LazyThreadSafetyMode mode) in System.Lazy 1.ExecutionAndPublication(LazyHelper executeAndPublication, Boolean useDefaultConstructor)     System.Lazy 1.CreateValue () in System.Data.Entity.Infrastructure.DependencyResolution.DbConfigurationManager.GetConfiguration () in System.Data.Entity.DbContext.InitializeLazyInternalContext (internal connection IInternalConnection, Model DbCompiledModeConfigurationConnectionFunctionCodemeterFunctionCodemeterFunctionCodemeterFunctionCodemeterFunctionCodelonMonfunctionCodemeterFunctionCodelonMonfunctionCodelonMonfunctionCodelonfunctionCodelonMonfunctionCodelonMonfunctionCodelonModelonfunctionCodelonModelonfunctionCodelonMonfunctionCodelonModelonfunctionCodelonModelonfunctionIcon)) } System.TypeLoadException

Answer 1

You see this type of error when the assembly you use is different from the reference assembly.

Example

In this condition, you see this error, because the first using version 3 and the others using 2

Please complete these checks.

1: Open the link with the right mouse button on the System.Data.Common.DbProviderFactories assembly and check its version

2: .

, ,

https://www.nuget.org/packages/System.Data.Common/

bin, dll 'System.Data.Common.DbProviderFactories', , " ", , , . appconfig .