Program.cs

public unsafe class Getter
{
    private delegate*<Obj, SomeStruct*, SomeStruct*> _functionPointer;

    public Getter(string propName)
    {
        var methodInfo = typeof(Obj).GetProperty(propName).GetGetMethod();
        _functionPointer = (delegate*<Obj, SomeStruct*, SomeStruct*>)methodInfo.MethodHandle.GetFunctionPointer();
    }

    public SomeStruct GetFromFunctionPointer(Obj target)
    {
        // Allocate some space on the stack for the return value
        SomeStruct returnValue = default;

        var v = _functionPointer(target, &returnValue);

        // We get a pointer to the return value. Dereference it to return the actual value to the caller
        return *v;
    }
}