Principal.IsMemberOf Method (GroupPrincipal)


Returns a Boolean value that specifies whether the principal is a member of the specified group.

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

public bool IsMemberOf(
	GroupPrincipal group


Type: System.DirectoryServices.AccountManagement.GroupPrincipal

The GroupPrincipal object for which principal membership is determined.

Return Value

Type: System.Boolean

true if the principal is a member of the specified group; otherwise false.

Exception Condition

The GroupPrincipal specified in the group parameter could not be found.


More than one matching GroupPrincipal was found.

If the current principal is an AD DS principal, the returned groups include the principal's primary group, as indicated by the primary group ID attribute on the AD DS object.

.NET Framework
Available since 3.5

IsMemberOf Overload
Principal Class
System.DirectoryServices.AccountManagement Namespace Overview

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