How to build CRUD operations on Oracle with MS technologies?

We are attempting to make CRUD (Create, Read, Update, Delete) operations available for an ORACLE database using a Microsoft stack, with technologies like WCF, ASP.Net Dynamic Data Services, Entity Framework, LINQ Extentions, etc.

I do not see any Entity Framework or LINQ extentions for Oracle database officially. 
What are the options offered by Microsoft (I am looking for non 3rd party software)?  

Any advice will be highly appreciated.

Hanu