Added reference project

ref/Entities/Channels/PrivateChannel.cs

@@ -0,0 +1,31 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Threading.Tasks;
+
+namespace Discord
+{
+    public class PrivateChannel : Channel, ITextChannel, IPrivateChannel
+    {        
+        public User Recipient { get; }
+        public IEnumerable<Message> Messages { get; }
+
+        public override DiscordClient Client => null;
+        public override ChannelType Type => default(ChannelType);
+
+        public override User CurrentUser => null;
+        public override IEnumerable<User> Users => null;
+
+        public Message GetMessage(ulong id) => null;
+        public Task<IEnumerable<Message>> DownloadMessages(int limit) => null;
+        public Task<IEnumerable<Message>> DownloadMessages(int limit, ulong? relativeMessageId, Relative relativeDir) => null;
+
+        public Task<Message> SendMessage(string text, bool isTTS = false) => null;
+        public Task<Message> SendFile(string path, string text = null, bool isTTS = false) => null;
+        public Task<Message> SendFile(Stream stream, string filename, string text = null, bool isTTS = false) => null;
+
+        public Task SendIsTyping() => null;
+
+        public override Task Save() => null;
+    }
+}