Error - The service youtube has thrown an exception.

Hi

  I am getting below error on execute statement -  Incompatible parameters specified in the request: mySubscribers, channelId

using (var yt = new YouTubeService(new BaseClientService.Initializer()
            {
                ApiKey = "xyz",
            }))
            {

                var searchRequest = yt.Subscriptions.List("snippet");
                searchRequest.ChannelId = "ChannelId";

                searchRequest.MySubscribers = true;
                var searchResponse = searchRequest.Execute();

                var objResult = searchResponse.Items.ToList();

}

Thanks