Add not supported exception on news channels when creating threads, #296

src/Discord.Net.Rest/Entities/Channels/RestNewsChannel.cs

@@ -25,5 +25,13 @@ namespace Discord.Rest
             return entity;
         }
         public override int SlowModeInterval => throw new NotSupportedException("News channels do not support Slow Mode.");
+
+        /// <summary>
+        ///     <b>News channels do not support thread creation with bots.</b>
+        /// </summary>
+        /// <inheritdoc/>
+        /// <exception cref="NotSupportedException"></exception>
+        public override Task<RestThreadChannel> CreateThreadAsync(string name, ThreadType type = ThreadType.PublicThread, ThreadArchiveDuration autoArchiveDuration = ThreadArchiveDuration.OneDay, IMessage message = null, bool? invitable = null, int? slowmode = null, RequestOptions options = null)
+            => throw new NotSupportedException("Cannot create threads in News channels");
     }
 }

src/Discord.Net.Rest/Entities/Channels/RestTextChannel.cs

@@ -270,7 +270,7 @@ namespace Discord.Rest
         /// <returns>
         ///     A task that represents the asynchronous create operation. The task result contains a <see cref="IThreadChannel"/>
         /// </returns>
-        public async Task<RestThreadChannel> CreateThreadAsync(string name, ThreadType type = ThreadType.PublicThread,
+        public virtual async Task<RestThreadChannel> CreateThreadAsync(string name, ThreadType type = ThreadType.PublicThread,
             ThreadArchiveDuration autoArchiveDuration = ThreadArchiveDuration.OneDay, IMessage message = null, bool? invitable = null, int? slowmode = null, RequestOptions options = null)
         {
             var model = await ThreadHelper.CreateThreadAsync(Discord, this, name, type, autoArchiveDuration, message, invitable, slowmode, options);

src/Discord.Net.WebSocket/Entities/Channels/SocketNewsChannel.cs

@@ -35,5 +35,13 @@ namespace Discord.WebSocket
         /// </remarks>
         public override int SlowModeInterval
             => throw new NotSupportedException("News channels do not support Slow Mode.");
+
+        /// <summary>
+        ///     <b>News channels do not support thread creation with bots.</b>
+        /// </summary>
+        /// <inheritdoc/>
+        /// <exception cref="NotSupportedException"></exception>
+        public override Task<SocketThreadChannel> CreateThreadAsync(string name, ThreadType type = ThreadType.PublicThread, ThreadArchiveDuration autoArchiveDuration = ThreadArchiveDuration.OneDay, IMessage message = null, bool? invitable = null, int? slowmode = null, RequestOptions options = null)
+            => throw new NotSupportedException("Cannot create threads in News channels");
     }
 }

src/Discord.Net.WebSocket/Entities/Channels/SocketTextChannel.cs

@@ -112,7 +112,7 @@ namespace Discord.WebSocket
         /// <returns>
         ///     A task that represents the asynchronous create operation. The task result contains a <see cref="IThreadChannel"/>
         /// </returns>
-        public async Task<SocketThreadChannel> CreateThreadAsync(string name, ThreadType type = ThreadType.PublicThread,
+        public virtual async Task<SocketThreadChannel> CreateThreadAsync(string name, ThreadType type = ThreadType.PublicThread,
             ThreadArchiveDuration autoArchiveDuration = ThreadArchiveDuration.OneDay, IMessage message = null, bool? invitable = null, int? slowmode = null, RequestOptions options = null)
         {
             var model = await ThreadHelper.CreateThreadAsync(Discord, this, name, type, autoArchiveDuration, message, invitable, slowmode, options);