How to get the current application pool user in IIS when using impersonate=true?

Question

In .net when a website hosted in IIS how do you get the current user the website is running under. ie the Application Pool user not the the current user accessing the site.

Using windows integrated and impersonate.

<authentication mode="Windows"/>
<identity impersonate="true"/>

Answer 1

To revert to the app pool user in managed code you can do the following:

using (WindowsIdentity.Impersonate(IntPtr.Zero)) 
{
   //This code executes under app pool user
}