Grpc.Core.GrpcEnvironment.UnregisterChannel C# (CSharp) Method

        internal static void UnregisterChannel(Channel channel)
        {
            lock (staticLock)
            {
                GrpcPreconditions.CheckNotNull(channel);
                GrpcPreconditions.CheckArgument(registeredChannels.Remove(channel), "Channel not found in the registered channels set.");
            }
        }

        /// <summary>
        /// Shuts down the channel cleanly. It is strongly recommended to shutdown
        /// all previously created channels before exiting from the process.
        /// </summary>
        /// <remarks>
        /// This method doesn't wait for all calls on this channel to finish (nor does
        /// it explicitly cancel all outstanding calls). It is user's responsibility to make sure
        /// all the calls on this channel have finished (successfully or with an error)
        /// before shutting down the channel to ensure channel shutdown won't impact
        /// the outcome of those remote calls.
        /// </remarks>
        public async Task ShutdownAsync()
        {
            lock (myLock)
            {
                GrpcPreconditions.CheckState(!shutdownRequested);
                shutdownRequested = true;
            }
            GrpcEnvironment.UnregisterChannel(this);

            shutdownTokenSource.Cancel();

            var activeCallCount = activeCallCounter.Count;

            if (activeCallCount > 0)
            {
                Logger.Warning("Channel shutdown was called but there are still {0} active calls for that channel.", activeCallCount);
            }

            lock (myLock)
            {
                handle.Dispose();
            }

            await GrpcEnvironment.ReleaseAsync().ConfigureAwait(false);
        }