.NET / MONO交叉编译的最佳实践

What are the best practices for writing code that can be cross compiled on .NET (windows) and Mono (linux)? Although I am very familiar with .NET, I am not that experienced in Mono and all its gotchas. Has anyone seen a good blog post or best practices paper on this, which I have not been able to dig up? I would be sticking with C# 3.0 level features.What are the best practices for writing code th