如何找出我的ASP.NET代码在哪个帐户下运行？

I am getting an 'Access to the path is denied" error message when running in debug mode. I have tried granting permissions to {MACHINENAME}\ASPNET and to NETWORK SERVICE but this hasn't made any difference. I have also tried < impersonate = true /> using an admin account, this also made no difference. So how do I establish exactly which account is being used?I am getting an 'Access to the path is denied"