The Oracle Technology Network (OTN) has launched a new developer center to help programmers build .NET applications for Oracle. This site contains .NET code samples, articles, and news that will help developers build database applications more productively.
http://www.oracle.com/technology/tech/dotnet
Also, Oracle will soon introduce new developer tools integrated directly into Visual Studio .NET that will improve developer productivity. These tools allow you to browse your Oracle schema, launch designers and wizards to create and alter schema objects, and drag and drop schema objects onto your form to automatically generate code. Additionally, the tools contain a PL/SQL editor and integrated context sensitive online help, including the Oracle SQL and PL/SQL Users Guides. And with the Oracle Data Window you won’t have to leave the Visual Studio environment for routine database tasks like inserting and updating Oracle data or testing stored procedures!