fixing async issue in asp.net.

Author: craiggwilson

src/MongoDB.Driver.Core/Core/Clusters/MultiServerCluster.cs

@@ -108,7 +108,7 @@ public override void Initialize()
                 }
 
                 var stopwatch = Stopwatch.StartNew();
-                MonitorServers();
+                MonitorServers().ConfigureAwait(false);
                 // We lock here even though AddServer locks. Monitors
                 // are re-entrant such that this won't cause problems,
                 // but could prevent issues of conflicting reports
@@ -174,7 +174,7 @@ protected override void RequestHeartbeat()
             }
         }
 
-        private async void MonitorServers()
+        private async Task MonitorServers()
         {
             var monitorServersCancellationToken = _monitorServersCancellationTokenSource.Token;
             while (!monitorServersCancellationToken.IsCancellationRequested)

src/MongoDB.Driver.Core/Core/ConnectionPools/ExclusiveConnectionPool.cs

@@ -249,7 +249,7 @@ public void Initialize()
                     _listener.ConnectionPoolBeforeOpening(new ConnectionPoolBeforeOpeningEvent(_serverId, _settings));
                 }
 
-                MaintainSize();
+                MaintainSize().ConfigureAwait(false);
 
                 if (_listener != null)
                 {
@@ -279,7 +279,7 @@ public void Dispose()
             }
         }
 
-        private async void MaintainSize()
+        private async Task MaintainSize()
         {
             var maintenanceCancellationToken = _maintenanceCancellationTokenSource.Token;
             while (!maintenanceCancellationToken.IsCancellationRequested)

src/MongoDB.Driver.Core/Core/Connections/BinaryConnection.cs

@@ -234,7 +234,7 @@ private async Task OpenAsyncHelper(CancellationToken cancellationToken)
             }
         }
 
-        private async void ReceiveBackgroundTask()
+        private async Task ReceiveBackgroundTask()
         {
             while (!_backgroundTaskCancellationToken.IsCancellationRequested)
             {
@@ -306,7 +306,7 @@ public async Task<ReplyMessage<TDocument>> ReceiveMessageAsync<TDocument>(
             }
         }
 
-        private async void SendBackgroundTask()
+        private async Task SendBackgroundTask()
         {
             while (!_backgroundTaskCancellationToken.IsCancellationRequested)
             {
@@ -411,8 +411,8 @@ public async Task SendMessagesAsync(IEnumerable<RequestMessage> messages, Messag
 
         private void StartBackgroundTasks()
         {
-            SendBackgroundTask();
-            ReceiveBackgroundTask();
+            SendBackgroundTask().ConfigureAwait(false);
+            ReceiveBackgroundTask().ConfigureAwait(false);
         }
 
         private void ThrowIfDisposed()

src/MongoDB.Driver.Core/Core/Servers/ClusterableServer.cs

@@ -129,7 +129,7 @@ public void Initialize()
 
                 var stopwatch = Stopwatch.StartNew();
                 _connectionPool.Initialize();
-                MonitorServer();
+                MonitorServer().ConfigureAwait(false);
                 stopwatch.Stop();
 
                 if (_listener != null)
@@ -204,7 +204,7 @@ public async Task<IChannelHandle> GetChannelAsync(CancellationToken cancellation
             }
         }
 
-        private async void MonitorServer()
+        private async Task MonitorServer()
         {
             var metronome = new Metronome(_settings.HeartbeatInterval);
             var heartbeatCancellationToken = _heartbeatCancellationTokenSource.Token;