Adds the specified users to the specified roles.
| Exception Type | Condition |
|---|---|
| ArgumentNullException | One of the roles in roleNames is null. -or- One of the users in usernames is null. |
| ArgumentException | One of the roles in roleNames is an empty string or contains a comma (,). -or- roleNames contains a duplicate element.-or-usernames contains a duplicate element. |
VGRoleProvider Class | Novalys.VisualGuard.Security.WebForm Namespace