/// <inheritdoc/>
        public override async Task <DialogTurnResult> BeginDialogAsync(DialogContext dc, object options = null, CancellationToken cancellationToken = default)
        {
            if (options is CancellationToken)
            {
                throw new ArgumentException($"{nameof(options)} cannot be a cancellation token");
            }

            if (Disabled != null && Disabled.GetValue(dc.State))
            {
                return(await dc.EndDialogAsync(cancellationToken : cancellationToken).ConfigureAwait(false));
            }

            if (dc.Context.Activity.ChannelId != Channels.Msteams)
            {
                throw new InvalidOperationException($"{Kind} works only on the Teams channel.");
            }

            string continuationToken = ContinuationToken.GetValueOrNull(dc.State);
            int?   pageSize          = PageSize.GetValueOrNull(dc.State);

            var result = await TeamsInfo.GetPagedMembersAsync(dc.Context, pageSize, continuationToken, cancellationToken : cancellationToken).ConfigureAwait(false);

            if (Property != null)
            {
                dc.State.SetValue(Property.GetValue(dc.State), result);
            }

            return(await dc.EndDialogAsync(result, cancellationToken : cancellationToken).ConfigureAwait(false));
        }