Change Members to IEnumerable.

src/Discord.Net.WebSocket/Entities/Roles/SocketRole.cs

@@ -1,7 +1,6 @@
 using Discord.Rest;
 using System;
-using System.Collections.Generic;
-using System.Collections.Immutable;
+using System.Collections.Generic;  
 using System.Diagnostics;
 using System.Linq;
 using System.Threading.Tasks;
@@ -25,8 +24,8 @@ namespace Discord.WebSocket
         public DateTimeOffset CreatedAt => SnowflakeUtils.FromSnowflake(Id);
         public bool IsEveryone => Id == Guild.Id;
         public string Mention => MentionUtils.MentionRole(Id);
-        public IReadOnlyCollection<SocketGuildUser> Members 
-            => Guild.Users.Where(x => x.Roles.Any(r => r.Id == Id)).ToImmutableArray();
+        public IEnumerable<SocketGuildUser> Members 
+            => Guild.Users.Where(x => x.Roles.Any(r => r.Id == Id));
 
         internal SocketRole(SocketGuild guild, ulong id)
             : base(guild.Discord, id)