For today, just a short code snippet for moving users (SPUser) between SharePoint Groups. Cheers!
private static int MoveUsers(Guid scid, Guid webid, string group1, string group2) { try { int movedUsers = 0; SPSecurity.RunWithElevatedPrivileges(delegate() { using (SPSite elevatedSite = new SPSite(scid)) { using (SPWeb elevatedWeb = elevatedSite.OpenWeb(webid)) { SPGroup spgroup1 = elevatedWeb.SiteGroups.GetByName(group1); SPGroup spgroup2 = elevatedWeb.SiteGroups.GetByName(group2); SPUser owner = elevatedWeb.CurrentUser; if (spgroup1.Owner is SPUser) { owner = spgroup1.Owner as SPUser; } foreach (SPUser user in spgroup1.Users) { if (!user.LoginName.Equals(owner.LoginName)) { spgroup1.RemoveUser(user); spgroup2.AddUser(user); movedUsers++; } } spgroup1.Update(); spgroup2.Update(); elevatedWeb.Update(); } } }); return movedUsers; } catch (Exception ex) { throw; } }