AuthenticationHelper RemoveSessionID Method Kentico 8.0 API Reference
Removes cookie with session ID which enforces ASP.NET to generate new session ID if RenewSessionAuthChange property is set to true.

Namespace: CMS.Membership
Assembly: CMS.Membership (in CMS.Membership.dll) Version: 8.0.0.0 (8.0.5239.26125)
See Also
AuthenticationHelper Class
AuthenticationHelper Members
CMS.Membership Namespace