The type initializer for 'Tweetinvi.Auth' threw an exception. System.Collections

I’ve seen similar issues in this repository, but couldn’t fix it. If I revert back the Tweetinvi 4.0 it works.

There are 2 inner exceptions.

First (this version does not exist on Nuget): FileNotFoundException: Could not load file or assembly ‘System.Collections, Version=4.1.0.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. The system cannot find the file specified.

Second: FileNotFoundException: Could not load file or assembly ‘System.Collections, Version=4.0.10.0, Culture=neutral, PublicKeyToken=b03f5f7f11d50a3a’ or one of its dependencies. The system cannot find the file specified.

I’ve also tried something this for app.config:

<?xml version="1.0" encoding="utf-8"?>
<configuration>
  <startup>
    <supportedRuntime version="v4.0" sku=".NETFramework,Version=v4.7.2" />
  </startup>
  <runtime>
    <assemblyBinding>
      <dependentAssembly>
        <assemblyIdentity name="System.Collections" publicKeyToken="B03F5F7F11D50A3A" culture="neutral" />
        <bindingRedirect oldVersion="0.0.0.0-4.3.0.0" newVersion="4.3.0.0" />
      </dependentAssembly>
    </assemblyBinding>
  </runtime>
</configuration>

[WhiteLionATX]

4.8 fixed nothing for me.

[paranoiks]

I managed to solve it. In the end, I had to get the latest version of the code and make sure all the projects in the solution have “.Net Standard 2.0” set as their Target Framework. After that rebuild and manually reference the new DLLs in your project