System.Runtime.Remoting.Lifetime.Lease.Unregister C# (CSharp) Method

        public void Unregister(ISponsor sponsor)
        {
            lock(this)
            {
                BCLDebug.Trace("REMOTE", "Lease",id," Unregister  state ",((Enum)state).ToString());
                if (state == LeaseState.Expired)
                    return;

                Object sponsorId = GetSponsorId(sponsor);
                lock(sponsorTable)
                {
                    if (sponsorId != null)
                    {
                        leaseManager.DeleteSponsor(sponsorId);                
                        SponsorStateInfo sponsorStateInfo = (SponsorStateInfo)sponsorTable[sponsorId];
                        sponsorTable.Remove(sponsorId);
                    }
                }
            }
        }