public void RemoveUserFromGroup(UserObject user) { if (user == null) { return; } if (string.IsNullOrEmpty(user.UserName)) { return; } if (string.IsNullOrEmpty(user.GroupName)) { return; } try { SPUser sharepointUser = GetUserObject(user.UserName); if (sharepointUser == null) { return; } SPGroup sharepointGroup = GetGroupObject(user.GroupName); if (sharepointGroup == null) { return; } sharepointGroup.RemoveUser(sharepointUser); sharepointGroup.Update(); } catch (Exception ex) { var log = new AppEventLog(AppException.ExceptionMessage(ex, "RemoveUserFromGroup", "ClsHelper")); log.WriteToLog(); } }