Minor edit

src/Discord.Net/DiscordConfig.cs

@@ -44,7 +44,7 @@ namespace Discord
 
         public const string ClientAPIUrl = "https://discordapp.com/api/";
         public const string StatusAPIUrl = "https://status.discordapp.com/api/v2/";
-        public const string CDNUrl = "https://cdn.discordapp.com";
+        public const string CDNUrl = "https://cdn.discordapp.com/";
         public const string InviteUrl = "https://discord.gg/";
 
         //Global

src/Discord.Net/Models/Server.cs

@@ -15,7 +15,7 @@ namespace Discord
 	public sealed class Server
     {
         internal static string GetIconUrl(ulong serverId, string iconId)
-            => iconId != null ? $"{DiscordConfig.CDNUrl}/icons/{serverId}/{iconId}.jpg" : null;
+            => iconId != null ? $"{DiscordConfig.CDNUrl}icons/{serverId}/{iconId}.jpg" : null;
 
         private struct Member
         {

src/Discord.Net/Models/User.cs

@@ -12,7 +12,7 @@ namespace Discord
 	public class User
     {
         internal static string GetAvatarUrl(ulong userId, string avatarId) 
-            => avatarId != null ? $"{DiscordConfig.CDNUrl}/avatars/{userId}/{avatarId}.jpg" : null;
+            => avatarId != null ? $"{DiscordConfig.CDNUrl}avatars/{userId}/{avatarId}.jpg" : null;
 
         [Flags]
         private enum VoiceState : byte