谢谢！请问WF4中如何释放内存呢？

下面是我的部分代码，就是客户端调用WCF服务端的GetData方法100次，GetData方法只返回一个result，值为"true"的字符串：

基于WCF的WF代码：

<WorkflowService mc:Ignorable="sap" ConfigurationName="Service1" sap:VirtualizedContainerService.HintSize="309,382" Name="Service1" mva:VisualBasic.Settings="Assembly references and imported namespaces serialized as XML namespaces" xmlns="http://schemas.microsoft.com/netfx/2009/xaml/servicemodel" xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006" xmlns:mv="clr-namespace:Microsoft.VisualBasic;assembly=System" xmlns:mva="clr-namespace:Microsoft.VisualBasic.Activities;assembly=System.Activities" xmlns:p="http://tempuri.org/" xmlns:p1="http://schemas.microsoft.com/netfx/2009/xaml/activities" xmlns:s="clr-namespace:System;assembly=mscorlib" xmlns:s1="clr-namespace:System;assembly=System" xmlns:s2="clr-namespace:System;assembly=System.Xml" xmlns:s3="clr-namespace:System;assembly=System.Core" xmlns:sad="clr-namespace:System.Activities.Debugger;assembly=System.Activities" xmlns:sap="http://schemas.microsoft.com/netfx/2009/xaml/activities/presentation" xmlns:scg="clr-namespace:System.Collections.Generic;assembly=System" xmlns:scg1="clr-namespace:System.Collections.Generic;assembly=System.ServiceModel" xmlns:scg2="clr-namespace:System.Collections.Generic;assembly=System.Core" xmlns:scg3="clr-namespace:System.Collections.Generic;assembly=mscorlib" xmlns:sd="clr-namespace:System.Data;assembly=System.Data" xmlns:sl="clr-namespace:System.Linq;assembly=System.Core" xmlns:st="clr-namespace:System.Text;assembly=mscorlib" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  <p1:Sequence DisplayName="Sequential Service" sad:XamlDebuggerXmlReader.FileName="D:\源代码\WFMemoryTest\WfServer\WfServer\Service1.xamlx" sap:VirtualizedContainerService.HintSize="279,352" mva:VisualBasic.Settings="Assembly references and imported namespaces serialized as XML namespaces">
    <p1:Sequence.Variables>
      <p1:Variable x:TypeArguments="CorrelationHandle" Name="handle" />
      <p1:Variable x:TypeArguments="x:Int32" Name="data" />
    </p1:Sequence.Variables>
    <sap:WorkflowViewStateService.ViewState>
      <scg3:Dictionary x:TypeArguments="x:String, x:Object">
        <x:Boolean x:Key="IsExpanded">True</x:Boolean>
      </scg3:Dictionary>
    </sap:WorkflowViewStateService.ViewState>
    <Receive x:Name="__ReferenceID0" CanCreateInstance="True" DisplayName="ReceiveRequest" sap:VirtualizedContainerService.HintSize="257,94" OperationName="GetData" ServiceContractName="p:IService">
      <Receive.CorrelationInitializers>
        <RequestReplyCorrelationInitializer CorrelationHandle="[handle]" />
      </Receive.CorrelationInitializers>
    </Receive>
    <SendReply Request="{x:Reference __ReferenceID0}" DisplayName="SendResponse" sap:VirtualizedContainerService.HintSize="257,94">
      <SendParametersContent>
        <p1:InArgument x:TypeArguments="x:String" x:Key="result">true</p1:InArgument>
      </SendParametersContent>
    </SendReply>
  </p1:Sequence>
</WorkflowService>

Web.config配置：

<?xml version="1.0" encoding="utf-8" ?> <configuration>   <system.web>     <compilation debug="true" targetFramework="4.0" />   </system.web>   <system.serviceModel>     <behaviors>       <serviceBehaviors>         <behavior>           <!-- To avoid disclosing metadata information, set the value below to false and remove the metadata endpoint above before deployment -->           <serviceMetadata httpGetEnabled="true"/>           <!-- To receive exception details in faults for debugging purposes, set the value below to true.  Set to false before deployment to avoid disclosing exception information -->           <serviceDebug includeExceptionDetailInFaults="false"/>

        <sqlWorkflowInstanceStore connectionString="××××××××××"/>           <!--Set the TimeToUnload to 0 to force the WF to be unloaded. To have a durable delay, the WF needs to be unloaded otherwise it will be thread as an in-memory delay-->           <workflowIdle timeToUnload="0"/>         </behavior>       </serviceBehaviors>     </behaviors>     <serviceHostingEnvironment multipleSiteBindingsEnabled="true" />   </system.serviceModel>   <system.webServer>     <modules runAllManagedModulesForAllRequests="true"/>   </system.webServer> </configuration>

客户端调用：

 ServiceReference1.ServiceClient client = new ServiceReference1.ServiceClient();
            for (int i = 0; i <= 100; i++)
            {
                string result = client.GetData();
            }