Resolve some reviews

src/Discord.Net.Core/Entities/Guilds/WelcomeScreen.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Collections.Immutable;
 
 namespace Discord;
 
@@ -18,7 +19,7 @@ public class WelcomeScreen
     {
         Description = description;
 
-        Channels = channels;
+        Channels = channels.ToImmutableArray();
     }
 
 }

src/Discord.Net.Core/Entities/Invites/IInvite.cs

@@ -57,7 +57,7 @@ namespace Discord
         ///     Gets the guild this invite is linked to.
         /// </summary>
         /// <remarks>
-        ///     Guild might have empty properties due to API not returning full guild object.
+        ///     The guild may be partially populated.
         /// </remarks>
         /// <returns>
         ///     A guild object representing the guild that the invite points to.

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

@@ -66,7 +66,7 @@ namespace Discord.API
         [JsonProperty("premium_subscription_count")]
         public int? PremiumSubscriptionCount { get; set; }
         [JsonProperty("preferred_locale")]
-        public Optional<string> PreferredLocale { get; set; }
+        public string PreferredLocale { get; set; }
         [JsonProperty("public_updates_channel_id")]
         public ulong? PublicUpdatesChannelId { get; set; }
         [JsonProperty("max_video_channel_users")]

src/Discord.Net.Rest/API/Rest/ModifyGuildWelcomeScreenParams.cs

@@ -2,7 +2,6 @@ using Newtonsoft.Json;
 
 namespace Discord.API.Rest;
 
-
 [JsonObject(MemberSerialization = MemberSerialization.OptIn)]
 internal class ModifyGuildWelcomeScreenParams
 {

src/Discord.Net.Rest/Entities/Guilds/RestGuild.cs

@@ -181,8 +181,8 @@ namespace Discord.Rest
                 MaxMembers = model.MaxMembers.Value;
             if (model.MaxVideoChannelUsers.IsSpecified)
                 MaxVideoChannelUsers = model.MaxVideoChannelUsers.Value;
-            PreferredLocale = model.PreferredLocale.IsSpecified ? model.PreferredLocale.Value : null;
-            PreferredCulture = model.PreferredLocale.IsSpecified ? new CultureInfo(PreferredLocale) : null;
+            PreferredLocale = model.PreferredLocale;
+            PreferredCulture = model.PreferredLocale is null ? null : new CultureInfo(PreferredLocale);
             if (model.ApproximateMemberCount.IsSpecified)
                 ApproximateMemberCount = model.ApproximateMemberCount.Value;
             if (model.ApproximatePresenceCount.IsSpecified)

src/Discord.Net.WebSocket/Entities/Guilds/SocketGuild.cs

@@ -515,7 +515,7 @@ namespace Discord.WebSocket
                 MaxMembers = model.MaxMembers.Value;
             if (model.MaxVideoChannelUsers.IsSpecified)
                 MaxVideoChannelUsers = model.MaxVideoChannelUsers.Value;
-            PreferredLocale = model.PreferredLocale.IsSpecified ? model.PreferredLocale.Value : null;
+            PreferredLocale = model.PreferredLocale;
             PreferredCulture = PreferredLocale == null ? null : new CultureInfo(PreferredLocale);
             if (model.IsBoostProgressBarEnabled.IsSpecified)
                 IsBoostProgressBarEnabled = model.IsBoostProgressBarEnabled.Value;