Comment 4 for bug 996427

We have other places in the NUnit syntax where we accept equally Properties, Fields and Methods. We just don't use the word 'Property' to describe them. Perhaps that's the way to handle this. Once we are using the word 'Property' we are conceptually at a level of implementation, below the point where fields and properties are interchangeable.

In fact, I think it would be desireable to get rid of the need to specify strings as names entirely, which is why I lean more toward the use of Lambdas in the future.