ActiveDirectoryMembershipProvider.DeleteUser Method (String, Boolean)


The .NET API Reference documentation has a new home. Visit the .NET API Browser on to see the new experience.

Removes a user's membership information from the Active Directory data store.

Namespace:   System.Web.Security
Assembly:  System.Web (in System.Web.dll)

	Unrestricted = true)]
	Unrestricted = true)]
	Unrestricted = true)]
public override bool DeleteUser(
	string username,
	bool deleteAllRelatedData


Type: System.String

The name of the user to delete.

Type: System.Boolean

This parameter is ignored by the DeleteUser method.

Return Value

Type: System.Boolean

true if the user was deleted; otherwise, false if the user was not found in the data store.

Exception Condition

username is empty, or exceeds the maximum length for the user name (usually 256 characters).

- or -

username contains commas.

- or -

The user name is mapped to the userPrincipalName attribute and the userName parameter contains backslashes.


username is null.


An error occurred while attempting to delete the user.


The DeleteUser method is called before the ActiveDirectoryMembershipProvider instance is initialized.

The DeleteUser method immediately removes the user identified by the username parameter. Since the Active Directory data store does not store user information in separate areas of the directory, the deleteAllRelatedData parameter is ignored, although it must be set to either true or false when calling the DeleteUser method.

The ActiveDirectoryMembershipProvider class finds the user instance to delete by performing a single-level search for the user name in the users container determined by the connection string. See the ActiveDirectoryMembershipProvider class topic for more information about connection strings.

username must be 64 characters or less.

System_CAPS_security Security Note

You cannot delete users unless the credentials used to connect to the Active Directory server have either Domain Administrator rights (not recommended) or the "delete child instances" access right.

.NET Framework
Available since 2.0
Return to top