using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public class Test

    {

        public string Id {get;set;}

        public bool HideInUI {get;set;}

        public bool SubscriptionType {get;set;}

        public Test(){

            SubscriptionType = true;

        }

    }

    public static void Main()

    {

        var all = new List<Test>{

            new Test{Id = "test1"},

            new Test{Id = "test2", HideInUI = true}, // filtered

            new Test{Id = "test3", SubscriptionType = false},

            new Test{Id = "test4", HideInUI = true, SubscriptionType = false}, // filtered

​

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.WorkspaceDeliverer"},

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.WorkspaceDeliverer", HideInUI = true}, // filtered

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.WorkspaceDeliverer", SubscriptionType = false},

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.WorkspaceDeliverer", HideInUI = true, SubscriptionType = false}, // filtered

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.UserMessagesDeliverer"},

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.UserMessagesDeliverer", HideInUI = true}, // filtered

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.UserMessagesDeliverer", SubscriptionType = false},

            new Test{Id = "Accellos.Platform.Alerts.DefaultDeliverers.UserMessagesDeliverer", HideInUI = true, SubscriptionType = false}, // filtered

        };

        var filtered = all.Where( deliverer => !deliverer.HideInUI && 

                              (deliverer.SubscriptionType != false ||

                               deliverer.Id != "Accellos.Platform.Alerts.DefaultDeliverers.WorkspaceDeliverer" || 

                               deliverer.Id != "Accellos.Platform.Alerts.DefaultDeliverers.UserMessagesDeliverer")).ToList();

        foreach(var one in filtered)

            Console.WriteLine(Newtonsoft.Json.JsonConvert.SerializeObject(one));

    }

}