A Visual Studio project written in C#, test connection with Oracle by ODP.NET managed driver, which does not need to have Oracle client installed. Instead, simply reference "Oracle.ManagedDataAccess.dll" will do the work. 1.For latest driver, go to this site: http://www.oracle.com/technetwork/topics/dotnet/downloads/index.html click 32-bit ODAC Xcopy and NuGet Downloads, goto page: http://www.oracle.com/technetwork/database/windows/downloads/utilsoft-087491.html Check "Download the ODAC NuGet packages" to download driver, reference Oracle.ManagedDataAccess.dll in lib for your Visual Studio project. 2.For detial guidence, reference here: http://www.oracle.com/technetwork/articles/dotnet/vs2010-oracle-dev-410461.html