Several times I've heard the following question asked:

I have an ASP.NET application and I need access to network resources that my account running ASP.NET does not have. How can I change the permissions at runtime without setting up Impersonation or using a high privilige account for my ASP.NET user account?

In short, how can you raise permissions of an ASP.NET request at runtime to perform some task that requires rights that the standard account ASP.NET runs under cannot handle?