<PackageReference Include="Microsoft.CSharp" Version="4.7.0-preview1.19504.10" />

CController

abstract class CController
namespace Microsoft.CSharp.RuntimeBinder.Errors { internal abstract class CController { private CErrorFactory _errorFactory; protected CController() { _errorFactory = new CErrorFactory(); } public abstract void SubmitError(CError pError); public CErrorFactory GetErrorFactory() { return _errorFactory; } } }