I have installed Visual Studio 2010 and Oracle 11g in my Window 7.
Oracle seem to be fine because i can connect to System user, Create user and create database.
But the problem is that I can not connect the Oracle to my VB.net project and there is no System.Data.OracleClient Namespace. Do I need to install Oracle Client in my computer even though i have installed Oracle Server?
You have to install Oracle Data Provider for .net, which is a separate download. Older oracle versions relied upon OleDb, but newer versions provide their own Data Provider.