Assembly: System.DirectoryServices (in system.directoryservices.dll)
The ActiveDirectorySite object to search for in this collection.
Return ValueThe zero-based index of the first matching object. Returns -1 if no member of this collection is identical to the ActiveDirectorySite object.
A call to the underlying directory service resulted in an error.
site is a null reference (Nothing in Visual Basic).
The ActiveDirectorySite object has not yet been saved in the Active Directory store.
Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter EditionThe Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.