Распространенное исключение WCF: соединение неожиданно закрыто

У меня три проекта. Один - это проект служб WCF, один - проект WPF, а третий - проект модульного тестирования Microsoft. Я настраиваю проект служб WCF с объектом данных, который выглядит следующим образом:

[DataContract]
public enum Priority
{
    Low,
    Medium,
    High
}

[DataContract]
public struct TimeInfo
{
    [DataMember]
    public Int16 EstimatedHours { get; set; }

    [DataMember]
    public Int16 ActualHours { get; set; }

    [DataMember]
    public DateTime StartDate { get; set; }

    [DataMember]
    public DateTime EndDate { get; set; }

    [DataMember]
    public DateTime CompletionDate { get; set; }
}

[DataContract]
public class Task
{
    [DataMember]
    public string Title { get; set; }

    [DataMember]
    public string Description { get; set; }

    [DataMember]
    public Priority Priority { get; set; }

    [DataMember]
    public TimeInfo TimeInformation { get; set; }

    [DataMember]
    public Decimal Cost { get; set; }
}

Мой контракт выглядит так:

[ServiceContract]
public interface ITaskManagement
{
    [OperationContract]
    List<Task> GetTasks();

    [OperationContract]
    void CreateTask(Task taskToCreate);

    [OperationContract]
    void UpdateTask(Task taskToCreate);

    [OperationContract]
    void DeleteTask(Task taskToDelete);
}

Когда я пытаюсь использовать службу в приложении WPF или в проекте модульного тестирования с помощью этого кода:

var client = new TaskManagementClient();

textBox1.Text = client.GetTasks().ToString();

client.Close();

Я получаю следующую ошибку: «Базовое соединение было закрыто: соединение было неожиданно закрыто».

App.config для проектов WPF и Unit Test выглядит так:

<system.serviceModel>
    <bindings>
        <wsHttpBinding>
            <binding name = "WSHttpBinding_ITaskManagement" closeTimeout = "00:01:00"
                openTimeout = "00:01:00" receiveTimeout = "00:10:00" sendTimeout = "00:01:00"
                bypassProxyOnLocal = "false" transactionFlow = "false" hostNameComparisonMode = "StrongWildcard"
                maxBufferPoolSize = "524288" maxReceivedMessageSize = "65536"
                messageEncoding = "Text" textEncoding = "utf-8" useDefaultWebProxy = "true"
                allowCookies = "false">
                <readerQuotas maxDepth = "32" maxStringContentLength = "8192" maxArrayLength = "16384"
                    maxBytesPerRead = "4096" maxNameTableCharCount = "16384" />
                <reliableSession ordered = "true" inactivityTimeout = "00:10:00"
                    enabled = "false" />
                <security mode = "Message">
                    <transport clientCredentialType = "Windows" proxyCredentialType = "None"
                        realm = "" />
                    <message clientCredentialType = "Windows" negotiateServiceCredential = "true"
                        algorithmSuite = "Default" establishSecurityContext = "true" />
                </security>
            </binding>
        </wsHttpBinding>
    </bindings>
    <client>
        <endpoint address = "http://localhost:9999/TaskManagement.svc"
            binding = "wsHttpBinding" bindingConfiguration = "WSHttpBinding_ITaskManagement"
            contract = "TaskManagement.ITaskManagement" name = "WSHttpBinding_ITaskManagement">
            <identity>
                <dns value = "localhost" />
            </identity>
        </endpoint>
    </client>
</system.serviceModel>

а web.config службы WCF выглядит так:

    <system.serviceModel>
    <behaviors>
        <serviceBehaviors>
            <behavior name = "InternetBasedWcfServices.TaskManagementBehavior">
                <serviceMetadata httpGetEnabled = "true" />
                <serviceDebug includeExceptionDetailInFaults = "false" />
            </behavior>
            <behavior name = "InternetBasedWcfServices.ScheduleManagementBehavior">
                <serviceMetadata httpGetEnabled = "true" />
                <serviceDebug includeExceptionDetailInFaults = "false" />
            </behavior>
        </serviceBehaviors>
    </behaviors>
    <services>
        <service behaviorConfiguration = "InternetBasedWcfServices.TaskManagementBehavior"
            name = "InternetBasedWcfServices.TaskManagement">
            <endpoint address = "" binding = "wsHttpBinding" contract = "InternetBasedWcfServices.ITaskManagement">
                <identity>
                    <dns value = "localhost" />
                </identity>
            </endpoint>
            <endpoint address = "mex" binding = "mexHttpBinding" contract = "IMetadataExchange" />
        </service>
        <service behaviorConfiguration = "InternetBasedWcfServices.ScheduleManagementBehavior"
            name = "InternetBasedWcfServices.ScheduleManagement">
            <endpoint address = "" binding = "wsHttpBinding" contract = "InternetBasedWcfServices.IScheduleManagement">
                <identity>
                    <dns value = "localhost" />
                </identity>
            </endpoint>
            <endpoint address = "mex" binding = "mexHttpBinding" contract = "IMetadataExchange" />
        </service>
    </services>
</system.serviceModel>

Это не первый раз, и я предполагаю, что это проблема конфигурации. Но каждый раз я обычно просто сдуваю свой сервис и кладу его обратно или создаю новый сервисный проект. Тогда все работает замечательно. Если у кого-то есть идеи, это было бы здорово. Спасибо.

**

Updated: I've added comments for more of my troubleshooting on this problem. When an answer is available, if the answer is unpublished, I'll add it as an official "answer".

**