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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)

member FindDomainController : 
        siteName:string * 
        flag:LocatorOptions -> DomainController


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 a null reference (Nothing in Visual Basic).


The object has been disposed.

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0

.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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