Roles.RemoveUsersFromRoles Method (String, String)
Removes the specified user names from the specified roles.
Assembly: System.Web (in System.Web.dll)
One of the roles specified in roleNames is null.
One of the users specified in usernames is null.
One of the roles specified in roleNames is an empty string or contains a comma (,).
One of the users specified in usernames is an empty string or contains a comma (,).
roleNames contains a duplicate element.
usernames contains a duplicate element.
Role management is not enabled.
Themethod calls the default role provider to remove the specified users from the specified roles at the data source.
If the application uses the SqlRoleProvider class, the database updates that are performed during the call to the RemoveUsersFromRoles method are made within a transaction. If an error is encountered, such as a user name that is not in a specified role, the transaction is rolled back and no updates are performed.
Available since 2.0