How to properly close a client proxy (An existing connection was forcibly closed by the remote host)?

Question

Please don\'t close as duplicate until you read the question to the end; I already googled for hours without success.

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EDIT: Now I\'m convinced it\'s related to

Answer 1

To resolve this error, simply close the Channel Factory as well.

private async Task TestTask()
{
    Service1Client proxy = null;

    try
    {
        Console.WriteLine("Calling service");

        proxy = new Service1Client();
        return await proxy.DoWorkAsync();
    }
    finally
    {
        if (proxy.State != System.ServiceModel.CommunicationState.Faulted)
        {
            Console.WriteLine("Closing client");
            proxy.ChannelFactory.Close();
            proxy.Close();
        }
        else
        {
            Console.WriteLine("Aborting client");
            proxy.Abort();
        }
    }
}