Added DefaultMessageNotifications

src/Discord.Net/API/Common/Guild.cs

@@ -36,5 +36,7 @@ namespace Discord.API
         public string[] Features { get; set; }
         [JsonProperty("mfa_level")]
         public MfaLevel MfaLevel { get; set; }
+        [JsonProperty("default_message_notifications")]
+        public DefaultMessageNotifications DefaultMessageNotifications { get; set; }
     }
 }

src/Discord.Net/API/DiscordAPIClient.cs

@@ -543,7 +543,6 @@ namespace Discord.API
             Preconditions.NotNullOrEmpty(args.Name, nameof(args.Name));
             Preconditions.GreaterThan(args.OwnerId, 0, nameof(args.OwnerId));
             Preconditions.NotNull(args.Region, nameof(args.Region));
-            Preconditions.AtLeast(args.VerificationLevel, 0, nameof(args.VerificationLevel));
 
             return await SendAsync<Guild>("PATCH", $"guilds/{guildId}", args, options: options).ConfigureAwait(false);
         }

src/Discord.Net/Entities/Guilds/DefaultMessageNotifications.cs

@@ -0,0 +1,10 @@
+namespace Discord
+{
+    public enum DefaultMessageNotifications
+    {
+        /// <summary> By default, only mentions will trigger notifications. </summary>
+        MentionsOnly = 0,
+        /// <summary> By default, all messages will trigger notifications. </summary>
+        AllMessages = 1
+    }
+}

src/Discord.Net/Entities/Guilds/Guild.cs

@@ -24,6 +24,7 @@ namespace Discord
         public bool IsEmbeddable { get; private set; }
         public VerificationLevel VerificationLevel { get; private set; }
         public MfaLevel MfaLevel { get; private set; }
+        public DefaultMessageNotifications DefaultMessageNotifications { get; private set; }
 
         public override DiscordClient Discord { get; }
         public ulong? AFKChannelId { get; private set; }
@@ -62,6 +63,7 @@ namespace Discord
             _splashId = model.Splash;
             VerificationLevel = model.VerificationLevel;
             MfaLevel = model.MfaLevel;
+            DefaultMessageNotifications = model.DefaultMessageNotifications;
 
             if (model.Emojis != null)
             {

src/Discord.Net/Entities/Guilds/IGuild.cs

@@ -13,6 +13,10 @@ namespace Discord
         int AFKTimeout { get; }
         /// <summary> Returns true if this guild is embeddable (e.g. widget) </summary>
         bool IsEmbeddable { get; }
+        /// <summary> Gets the default message notifications for users who haven't explicitly set their notification settings. </summary>
+        DefaultMessageNotifications DefaultMessageNotifications { get; }
+        /// <summary> Gets the level of mfa requirements a user must fulfill before being allowed to perform administrative actions in this guild. </summary>
+        MfaLevel MfaLevel { get; }
         /// <summary> Gets the level of requirements a user must fulfill before being allowed to post messages in this guild. </summary>
         VerificationLevel VerificationLevel { get; }
         /// <summary> Returns the url to this guild's icon, or null if one is not set. </summary>