Added reference project

ref/Entities/Message.cs

@@ -0,0 +1,68 @@
+using System;
+using System.Collections.Generic;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    public class Message : IModel<ulong>
+    {
+        public class Attachment : File
+        {
+            public string Id { get; }
+            public int Size { get; }
+            public string Filename { get; }
+        }
+
+        public class Embed
+        {
+            public string Url { get; }
+            public string Type { get; }
+            public string Title { get; }
+            public string Description { get; }
+            public EmbedLink Author { get; }
+            public EmbedLink Provider { get; }
+            public File Thumbnail { get; }
+            public File Video { get; }
+        }
+
+        public class EmbedLink
+        {
+            public string Url { get; }
+            public string Name { get; }
+        }
+
+        public class File
+        {
+            public string Url { get; }
+            public string ProxyUrl { get; }
+            public int? Width { get; }
+            public int? Height { get; }
+        }
+
+        public DiscordClient Client { get; }        
+        public ulong Id { get; }
+        public ITextChannel Channel { get; }
+        public User User { get; }        
+        public bool IsTTS { get; }
+        public MessageState State { get; }
+        public string RawText { get; }
+        public string Text { get; }
+        public DateTime Timestamp { get; }
+        public DateTime? EditedTimestamp { get; }
+        public Attachment[] Attachments { get; }
+        public Embed[] Embeds { get; }
+        
+        public IEnumerable<User> MentionedUsers { get; }
+        public IEnumerable<IPublicChannel> MentionedChannels { get; }
+        public IEnumerable<Role> MentionedRoles { get; }
+        
+        public Server Server => null;
+        public bool IsAuthor => false;
+        
+        public Task Delete() => null;
+
+        public Task Save() => null;
+
+        public bool IsMentioningMe(bool includeRoles = false) => false;
+    }
+}