Anyway, I am the only one who reads this, right?

FoxTube.Core/Models/Inbox/Changelog.cs

@@ -0,0 +1,19 @@
+using System;
+
+namespace FoxTube.Core.Models.Inbox
+{
+    public class Changelog : InboxItem
+    {
+        public override string DefaultIcon => "\xE728";
+        public override string Title => "What's new in version " + Id;
+        public override string Type => "Changelog";
+
+        public Changelog(string version, string content, string description, DateTime timeStamp)
+        {
+            Id = version;
+            Content = content;
+            Description = description;
+            TimeStamp = timeStamp;
+        }
+    }
+}

FoxTube.Core/Models/Inbox/DeveloperMessage.cs

@@ -0,0 +1,22 @@
+using System;
+
+namespace FoxTube.Core.Models.Inbox
+{
+    public class DeveloperMessage : InboxItem
+    {
+        public override string DefaultIcon => "\xE119";
+        public override string Title => _title;
+        string _title;
+        public override string Type => "Message from developers";
+
+        public DeveloperMessage(string id, string title, string content, DateTime timeStamp, string avatar)
+        {
+            Id = id;
+            _title = title;
+            Content = content;
+            Description = content;
+            TimeStamp = timeStamp;
+            Avatar = avatar;
+        }
+    }
+}

FoxTube.Core/Models/Inbox/InboxItem.cs

@@ -0,0 +1,17 @@
+using System;
+
+namespace FoxTube.Core.Models
+{
+    public abstract class InboxItem
+    {
+        public string Id { get; set; }
+        public abstract string DefaultIcon { get; }
+        public string Avatar { get; set; }
+        public abstract string Title { get; }
+        public string Description { get; set; }
+        public string Content { get; set; }
+        public DateTime TimeStamp { get; set; }
+        public abstract string Type { get; }
+
+    }
+}