<PackageReference Include="NUnit" Version="4.4.0-beta.2.1" />

NUnit.Framework.Internal.GenericMethodHelper

public class GenericMethodHelper
GenericMethodHelper is able to deduce the Type arguments for a generic method from the actual arguments provided.
namespace NUnit.Framework.Internal { public class GenericMethodHelper { public GenericMethodHelper(MethodInfo method); public bool TryGetTypeArguments(object[] argList, out Type[] typeArguments); } }