How to Delete specific user from your sharepoint sites

Hey.

Small task I had today, to delete a certain user who left the company. They have a list in which they document all the workers who left, so I had to just check the list every day, see if there is anything new and if so, just delete that user from all SiteCollection - be aware, when you delete a user from the siteCollection it's enough, there is no need to drill down to each and each web site.

 


            foreach (SPWebApplication webApp in service.WebApplications)
            {
                SPSiteCollection colSites = webApp.Sites;
                for (int i = 0; i < colSites.Count; i++)
                {
                    using (SPWeb web = colSites[i].OpenWeb())
                    {
                        SPUser user = web.SiteUsers[UserName_ToDelete];

                        try
                        {
                            if (!user.IsDomainGroup && !user.IsSiteAdmin)
                            {
                                web.SiteUsers.Remove(user.LoginName);
                                web.Update();
                            }
                        }
                        catch (Exception ex)
                        {
                            // user not found
                        }
                    }
                    colSites[i].Dispose();
                }
                
            }