Validation framework for .NET Compact Framework 3.5

Do you know of a fast and simple entity validation framework that could be used in a Compact Framework project?

I've done some experiments with FluentValidation (using db4o System.Linq.Expressions, but it's rather slow) and EViL开发者_StackOverflow社区 (but it seems a bit half-baked).

Can you suggest any other or maybe point me to some resources on how to design such a framework so that it's both easy to use and performant?

The Legend framework has a lightweight set of fluent validation extensions (in Legend.Core.Tests). I've not done any perf experiments on it, but it's at least another data point you could look at.