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Domain.FindDomainController Method (String, LocatorOptions)

Finds a domain controller in this domain and in the specified site that meets the specified criteria.

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

public DomainController FindDomainController(
	string siteName,
	LocatorOptions flag


Type: System.String

The name of the site to search for the domain controller.

Type: System.DirectoryServices.ActiveDirectory.LocatorOptions

A combination of one or more of the LocatorOptions members that defines the type of domain controller to find.

Return Value

Type: System.DirectoryServices.ActiveDirectory.DomainController
A DomainController object that represents the domain controller that is found by this method.


A domain controller cannot be located.


A call to the underlying directory service resulted in an error.


This exception will occur for any of the following reasons.

  • siteName is an empty string.

  • flag contains an invalid value.


siteName is null.


The object has been disposed.

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