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DirectorySearcher Constructor (DirectoryEntry, String, String[])

Initializes a new instance of the DirectorySearcher class with the specified search root, search filter, and properties to retrieve..

Namespace:  System.DirectoryServices
Assembly:  System.DirectoryServices (in System.DirectoryServices.dll)

public DirectorySearcher(
	DirectoryEntry searchRoot,
	string filter,
	string[] propertiesToLoad


Type: System.DirectoryServices.DirectoryEntry

The node in the Active Directory Domain Services hierarchy where the search starts. The SearchRoot property is initialized to this value.

Type: System.String

The search filter string in Lightweight Directory Access Protocol (LDAP) format. The Filter property is initialized to this value.

Type: System.String[]

The set of properties that are retrieved during the search. The PropertiesToLoad property is initialized to this value.

The following table shows the initial property values of the DirectorySearcher object.


Initial value



.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

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

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