Web hosting error: Request for the permission of type 'System.Security

Scenario:
I have created a web app using visual studio 2013 and it was showing error message

Server Error in '/' Application.
--------------------------------------------------------------------------------

Security Exception 
Description: The application attempted to perform an operation not allowed by the security policy.  To grant this application the required permission please contact your system administrator or change the application's trust level in the configuration file. 

Exception Details: System.Security.SecurityException: Request for the permission of type 'System.Security.Permissions.EnvironmentPermission, mscorlib, Version=2.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089' failed.

Source Error: 

An unhandled exception was generated during the execution of the current web request. Information regarding the origin and location of the exception can be identified using the exception stack trace below.  




Solution:

In web.config adding the following line worked for me:

<system.web>
    <trust level="Full" originUrl="" />
  </system.web>