Redirecting to Access deined page

Scenario:
You want to redirect user to access denied page when your code attempts to access an object to which the user does not have access.

Solution:
SPUtility class provides method HandleAccessDenied, which redirects user to standard access denied page.

Code Snippet:

try
{
    //your code goes here
}
catch(Exception ex)
{
     SPUtility.HandleAccessDenied(ex);
}