SearchResult instances are similar to DirectoryEntry instances. The notable difference is that the DirectoryEntry retrieves its information from the Active Directory Domain Services hierarchy each time a new object is accessed, whereas the data for the SearchResult is already available in the SearchResultCollection that a DirectorySearcher query returns. If you try to get a SearchResult property that your query did not specify for retrieval, the property will not be available.

System..::.Object
  System.Collections..::.ReadOnlyCollectionBase
    System.DirectoryServices..::.ResultPropertyValueCollection

Any public static (Shared in Visual Basic) members of this type are thread safe. Any instance members are not guaranteed to be thread safe.

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

The .NET Framework and .NET Compact Framework do not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

.NET Framework

Supported in: 3.5, 3.0, 2.0, 1.1, 1.0

Reference