Oracle.ManagedDataAccess The system cannot find the file specified

Question

In my website project built on .net 3.5, when I add reference to the Oracle.ManagedDataAccess.dll by adding this in the web.config

<add assembly="Oracle.ManagedDataAccess, Version=4.121.1.0, Culture=neutral, PublicKeyToken=89B483F429C47342"/>

it give this error

Configuration Error 
  Description: An error occurred during the processing of a configuration file required to     service this request. Please review the specific error details below and modify your configuration file appropriately. 

 Parser Error Message: Could not load file or assembly 'Oracle.ManagedDataAccess, Version=4.121.1.0, Culture=neutral, PublicKeyToken=89b483f429c47342' or one of its dependencies. The system cannot find the file specified.

Answer 1

This error comes at .net version 3.5 The solution is to upgrade the .net version to .net 4.0 or above