The referenced assembly could not be resolved because it has a dependency on System.Data.OracleClient

Received the following build error: The referenced assembly "xxx" could not be resolved because it has a dependency on "System.Data.OracleClient, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089" which is not in the currently targeted framework ".NETFramework,Version=v4.0,Profile=Client". Please remove references to assemblies not in the targeted framework or consider re-targeting your project. This build error is caused by the project is targeting .NET Framework 4.0 Client Profile and references to an assembly,...