Caching using SpatialFocus.MethodCache but with Static Methods in C#

I am trying to use SpatialFocus.MethodCache but with a static method rather than in an instance of a class. I am getting an error:

1>MSBUILD : warning : Fody/SpatialFocus.MethodCache: Class Test contains [Cache] attribute but does not contain a single property implementing IMemoryCache interface

Has anyone had success making this work?

public class Test
{
    static protected IMemoryCache MemoryCache { get; }

    [Cache]
    static string Test()
    {
        return "hello";
    }
}