MS Dynamics 365- Disassociate record from N-N relationship entity

        /// <summary>
        /// Disassociate associated teams from user 
        /// </summary>
        /// <param name="userId">userId</param>
        /// <param name="organizationService">organizationService</param>
        private static void Disassociate(Guid userId,IOrganizationService organizationService)
        {
           // N-N Relationship name
            string nToNRelationshipName = "xyk_xyk_team_xyk_user";

            // Query to get related teams
            QueryExpression teams = new QueryExpression("xyk_team");
            teams.ColumnSet.AddColumns("xyk_teamid");

            // Associated link uisng relationship name , from attribute, to attribute
            var associateLink = teams.AddLink(nToNRelationshipName, "xyk_teamid", "xyk_teamid");
            associateLink.LinkCriteria = new FilterExpression() { Conditions = { new ConditionExpression("xyk_userid", ConditionOperator.Equal, userId) } };

            // Retrieve associated teams
            EntityCollection associatedTeams = organizationService.RetrieveMultiple(teams);            

            if (associatedTeams.Entities.Count > 0)
            {
                EntityReferenceCollection teamsCollection = new EntityReferenceCollection();
                foreach (Entity team in associatedTeams.Entities)
                {
                    var reference = new EntityReference("xyk_team", team.Id);
                    teamsCollection.Add(reference);
                }

                Relationship nIsToNRelationship = new Relationship(nToNRelationshipName);
                // Disassociate associated teams from user 
                organizationService.Disassociate("xyk_user", userId, nIsToNRelationship, teamsCollection);
            }
        }