System.Data.OracleClient namespace discontinued?
Oracle has created a special website for OracleClient developers who are interested in learning about how and why to migrate to the Oracle Data Provider for .NET (ODP.NET).. check it out:
http://www.oracle.com/technetwork/topics/dotnet/index-085703.html
(edit: Fixed the broken link)
Note this excerpt:
Microsoft will still make System.Data.OracleClient available in .NET Framework 4, but it will be labeled as "deprecated"
So go ahead and keep using it for updating existing applications where you relied on it previously. But for new development, you'll want to find an alternative. This shouldn't be too hard, as the whole stated reason it will be discontinued is that most people were already using alternatives. If you read further down the article it lists out the main options:
among those who offer such providers are DataDirect Technologies and Devart (formerly known as Core Lab). In addition, Oracle's provider, called Oracle Data Provider for .NET (ODP.NET), is a popular and viable option