Dear everyone please clear this up for me.

I'm confused about which identity a website runs under.   I thought Environment.Username was the main one used to do things like attempt file access, connect to a database etc.  I can use Impersonation to change this.  So everything should run under this account but am I wrong?   I have a site that works running from Visual Studio, or connecting through IE on the development server ONLY, it wont work from another computer even when signed in as the same domain account.

I know that these 3 show up properly

WindowsIdentity.GetCurrent.Name
Environment.UserName
User.Identity.Name

The only difference is this

Auth_User

I'm not sure whats going on.  please clarify the differences between these and any others I missed.

Does your impersonated account have access to all the the neccesary files, like the .net temporary files. If you are running IIS6 on a Windows 2003 you should also check the identity of the application pool the website is running under, by default it is the NETWORK SERVICE.

What error do you get? 

Here's some more info.  

When running the site using impersonation of my account through web.config  <identity impersonate="true" username="domain\xyz" password="xyz"> my site works fine.   However, when I use programmatic impersonation, as described in MSDN or http://west-wind.com/weblog/posts/1572.aspx it wont work right

using Web.Config Impersonation

WindowsIdentity.GetCurrent.Name: domain\xyz
Environment.UserName: xyz
User.Identity.Name : domain\bkimuser

everything works.

Using programmtic impersonation and setting web.config  <identity impersonate="true>

page starts with

i have the same problem... does anyone have any answer????

thanks