Close the client channel before closing the ServiceHost

Author: amaitland

CefSharp/Internals/BrowserProcessServiceHost.cs

@@ -60,6 +60,35 @@ public Task<JavascriptResponse> EvaluateScriptAsync(int browserId, long frameId,
             }).Unwrap();
         }
 
+        protected override void OnClose(TimeSpan timeout)
+        {
+            var task = operationContextTaskCompletionSource.Task;
+
+            CloseChannel(task);
+
+            base.OnClose(timeout);
+        }
+
+        private void CloseChannel(Task<OperationContext> task)
+        {
+            try
+            {
+                if (task.IsCompleted)
+                {
+                    var context = task.Result;
+
+                    if (context.Channel != null && context.Channel.State == CommunicationState.Opened)
+                    {
+                        context.Channel.Close();
+                    }
+                }
+            }
+            catch (Exception)
+            {
+
+            }
+        }
+
         protected override void OnClosed()
         {
             base.OnClosed();