.NET assemblies in Mono

I was looking for Entity Framework support in Mono and found the followi开发者_开发技巧ng page: http://www.mono-project.com/EntityFramework But why can't we just reference .NET assemblies that are needed for EF support to Mono project? What are the general limitations of using .NET assemblies under MONO? COM-objects? WinApi? License?

There are a lot of .NET libraries that use native Windows API calls for their internals. They just hide those complexities from .NET Developers.

Any portion of those Libraries needs to be ported for use in Mono (including the ones you see listed there...ADO.NET makes heavy use of those calls).