C# Check if run as administrator

Question

Possible Duplicate: Check if the current user is administrator I need to test if the application (written in C#, running os Windows XP/Vista/7) is running as administrator (as in right-click .exe -> Run as Administrator, or Run as Administrator in the Compability tab under Properties). I have googled and searched StackOverflow but i can not find a working solution. My last attempt was this: ``` if ((new WindowsPrincipal(WindowsIdentity.GetCurrent())) .IsInRole(WindowsBuiltInRole.Administrator)) { ... } ```

Accepted Answer

Try this

```
public static bool IsAdministrator()
{
    var identity = WindowsIdentity.GetCurrent();
    var principal = new WindowsPrincipal(identity);
    return principal.IsInRole(WindowsBuiltInRole.Administrator);
}
```

This looks functionally the same as your code, but the above is working for me...

doing it functionally, (without unnecessary temp variables) ...

```
public static bool IsAdministrator()
{
   return (new WindowsPrincipal(WindowsIdentity.GetCurrent()))
             .IsInRole(WindowsBuiltInRole.Administrator);
}  
```

or, using expression-bodied property:

```
public static bool IsAdministrator =>
   new WindowsPrincipal(WindowsIdentity.GetCurrent())
       .IsInRole(WindowsBuiltInRole.Administrator);
```

C# Check if run as administrator

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