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

        internal static async Task ReleaseAsync()
        {
            GrpcEnvironment instanceToShutdown = null;
            lock (staticLock)
            {
                GrpcPreconditions.CheckState(refCount > 0);
                refCount--;
                if (refCount == 0)
                {
                    instanceToShutdown = instance;
                    instance = null;
                }
            }

            if (instanceToShutdown != null)
            {
                await instanceToShutdown.ShutdownAsync();
            }
        }

        /// <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);
        }