Here is a brief explanation;
According to this forum on WindowsIdentity.GetCurrent().Name vs. User.Identity.Name:
User.Identity.Namerepresents the identity passed from IIS.WindowsIdentity.GetCurrent().Nameis the identity under which the thread is running.
Depending on your app’s authentication settings in IIS, they will return different values:
Anonymous | Impersonate | User.Identity.Name | WindowsIndentiy.GetCurrent() |
| Yes | True | Empty String | IUSR_<machineName> |
| Yes | False | Empty String | NT Authority\Network Service |
| No | True | domain\user | domain\user |
| No | False | domain\user | NT Authority\Network Service |
Legend:
- Where domain\user will show up as:
- domain\user for Active Directory
- machineName\userName for local account
- Where NT Authority\Network Service will show up as:
- NT Authority\Network Service for Windows Server or ASP.NET
- machineName\ASPNET_WP for Windows XP
Resource
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