To immutable list

src/Discord.Net.Core/Entities/Teams/ITeam.cs

@@ -18,7 +18,7 @@ namespace Discord
         /// <summary>
         ///     Gets the members of this team.
         /// </summary>
-        List<ITeamMember> TeamMembers { get; }
+        IReadOnlyList<ITeamMember> TeamMembers { get; }
         /// <summary>
         ///     Gets the user identifier that owns this team.
         /// </summary>

src/Discord.Net.Rest/Entities/Teams/RestTeam.cs

@@ -1,4 +1,5 @@
 using System.Collections.Generic;
+using System.Collections.Immutable;
 using System.Linq;
 using Model = Discord.API.Team;
 
@@ -9,7 +10,7 @@ namespace Discord.Rest
         /// <inheritdoc />
         public string IconUrl => _iconId != null ? CDN.GetTeamIconUrl(Id, _iconId) : null;
         /// <inheritdoc />
-        public List<ITeamMember> TeamMembers { get; private set; }
+        public IReadOnlyList<ITeamMember> TeamMembers { get; private set; }
         /// <inheritdoc />
         public ulong OwnerUserId { get; private set; }
 
@@ -30,7 +31,7 @@ namespace Discord.Rest
             if (model.Icon.IsSpecified)
                 _iconId = model.Icon.Value;
             OwnerUserId = model.OwnerUserId;
-            TeamMembers = model.TeamMembers.Select(x => new RestTeamMember(Discord, x)).ToList<ITeamMember>();
+            TeamMembers = model.TeamMembers.Select(x => new RestTeamMember(Discord, x)).ToImmutableList();
         }
     }
 }