Detect whether C#-method uses yield return

Question

I am trying to write a simple caching mechanism. Basically, whenever a method is called, its return value should be saved in a cache. Using AOP, my simplified CacheAspect looks as follows.

using Castle.DynamicProxy;

public class CacheAspect : IInterceptor
{
    private object cache;

    public void Intercept(IInvocation invocation)
    {
        if (cache is null)
        {
            invocation.Proceed();
            cache = invocation.ReturnValue;

            return;
        }

        invocation.ReturnValue = cache;
    }
}

However, when the aspect intercepts a method that uses yield return, it only caches the compiler-generated state machine and not the materialized result. Therefore, I would like the aspect to fail-fast in that case.

Therefore I want to deduct from a method's return value, whether or not it uses yield return. So far, I have only found this solution that gets the job done.

private static bool IsReturnTypeCompilerGenerated(IInvocation invocation) =>
    invocation
        .ReturnValue
        .GetType()
        .GetCustomAttribute(typeof(CompilerGeneratedAttribute), inherit: true)
        is object;

My issue with this is that I don't know, what other compiler-generated types there are and in which situations they arise. Is it possible, that I exclude methods from my caching mechanism that shouldn't be excluded? Or put differently: Is there a way to more specifically target methods that use yield return?