Good question! There are indeed parts of "Robust Java" that I feel would be applicable to the broader work of developing robust enterprise software. Specifically, I've spent some effort elaborating good practices and key considerations in a few chapters in the book. It seems as though the following topics from the book all have more universal applicability:
best (and worst) practices for handling exceptions
That said, all of the example code in the book is written in Java, and I don't specifically focus on other languages, technologies and frameworks. I suspect you'd have to do some filtering to gather more general recommendations for the .NET framework while reading the book.