ReflectionTypeLoadException: Could not load file or assembly 'Microsoft.OData.Core'

[aureole82]

Using NuGet package Simple.OData.V4.Client 6.0.1 I get the following exception on every request:

System.InvalidOperationException
  HResult=0x80131509
  Message=Unable to load OData adapter from assembly Simple.OData.Client.V4.Adapter
  Source=Simple.OData.Client.Core
  StackTrace:
   at Simple.OData.Client.ODataAdapterFactory.LoadModelAdapter(ITypeCache typeCache, String modelAdapterAssemblyName, String modelAdapterTypeName, Object[] ctorParams)
   at Simple.OData.Client.ODataAdapterFactory.<>c__DisplayClass11_0.<GetModelAdapterLoader>b__1()
   at Simple.OData.Client.ODataAdapterFactory.CreateAdapterLoader(String metadataString, ITypeCache typeCache)
   at Simple.OData.Client.EdmMetadataCache.GetODataAdapter(ISession session)
   at Simple.OData.Client.Session.<Initialize>d__19.MoveNext()
   at Simple.OData.Client.Session.<ResolveAdapterAsync>d__22.MoveNext()
   at Simple.OData.Client.ODataClient.<FindEntryAsync>d__92.MoveNext()
   at Simple.OData.Client.FluentClientBase`2.<FilterAndTypeColumnsAsync>d__98.MoveNext()
   at Program.<<Main>$>d__0.MoveNext() in C:\Sources\ConsoleApp1\ConsoleApp1\Program.cs:line 13

  This exception was originally thrown at this call stack:
    [External Code]

Inner Exception 1:
ReflectionTypeLoadException: Unable to load one or more of the requested types.
Could not load file or assembly 'Microsoft.OData.Edm, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.
Could not load file or assembly 'Microsoft.OData.Core, Version=7.10.0.0, Culture=neutral, PublicKeyToken=31bf3856ad364e35'. The system cannot find the file specified.

Solution:
You should add Microsoft.OData.Core as dependency. (At least adding this manually fixes the issue on my machine).

[NoahStolk]

We are also running into this problem since upgrading to 6.0.1. From our packages.lock.json file:

"Simple.OData.Client": {
  "type": "Direct",
  "requested": "[6.0.1, )",
  "resolved": "6.0.1",
  "dependencies": {
    "Microsoft.Data.OData": "[5.8.5, 6.0.0)",
    "Microsoft.OData.Core": "[7.9.4, 8.0.0)"
  }
},
"Microsoft.OData.Core": {
  "type": "Transitive",
  "resolved": "7.9.4",
  "dependencies": {
    "Microsoft.Bcl.AsyncInterfaces": "5.0.0",
    "Microsoft.OData.Edm": "[7.9.4]",
    "Microsoft.Spatial": "[7.9.4]"
  }
},
"Microsoft.OData.Edm": {
  "type": "Transitive",
  "resolved": "7.9.4",
  "dependencies": {
    "System.Runtime.CompilerServices.Unsafe": "4.6.0",
    "System.Text.Encodings.Web": "4.7.2",
    "System.Text.Json": "4.6.0"
  }
},

It seems version 7.9.4 is resolved but 7.10.0 is requested by the runtime. For now, we will be applying the same workaround as mentioned. (Adding a direct package dependency to make sure the correct version is resolved and pinning the version number.)

<PackageReference Include="Microsoft.OData.Core" Version="[7.10.0]" />

[giarico]

I can't understand why this is not already solved after 3 months.
Without this workaround nothing works.

Is this project still alive??

[stefankaufmann]

I got so frustrated of this fix, that I created a Pull Request. Would be awesome, if you can provide a new nuget package containing the fix. Thanks.

[esbenbach]

@davidnmbond you are the only recent contributor in the commits history.
Do you have the power/permissions to approve and merge the PR opened by @stefankaufmann ?

[robertgro]

Pushing this, because resolving the issue and merging the PR are still in pending state.

[GerkinDev]

Had the same problem. I managed to work around it by explicitly specifying the version I want of the transitive dependency.

In csproj:

    <PackageReference Include="Microsoft.OData.Core" Version="7.10.0" />
    <PackageReference Include="Microsoft.OData.Edm" Version="7.10.0" />