Workflow persistence

        <p>
        What triggers persistence?
        <ul>
        <li>
        Runtime decides when to persist
        </li>
        <li>
        Persistence service decides how and where
        </li>
        <li>
        <div>Conditions:</div>
        <ul>
        <li>
        Anytime the WF goes idle (e.g. Delay Activity)
        </li>


        <li>
        Host App can control by calling Unload or TryUnload methods

        </li>


        <li>
        Transactions complete (TransactionScopeActivity or CompensatableTransactionScopeActivity)

        </li>


        <li>
        Custom Activity with PersistOnCloseAttribute completes

        </li>


        <li>
        CompensatableSequenceActivity completes
        </li>


        <li>
        When the WF terminates or completes

        </li>
        </ul>

        </li>
        </ul>
        </p>

        <pre data-sub="prettyprint:_">
        <?xml version="1.0" encoding="utf-8" ?>
        <configuration>
        <configSections>
        <section
        name="WorkflowWithPersistence"
        type="System.Workflow.Runtime.Configuration.WorkflowRuntimeSection,
        System.Workflow.Runtime, Version=3.0.00000.0,
        Culture=neutral, PublicKeyToken=31bf3856ad364e35"/>
        </configSections>

        <WorkflowWithPersistence>
        <CommonParameters>
        <add name="ConnectionString" value="Data Source=(local);Initial Catalog=WF;Integrated Security=true"/>
        </CommonParameters>
        <Services>
        <add
        type="System.Workflow.Runtime.Hosting.SqlWorkflowPersistenceService,
        System.Workflow.Runtime, Version=3.0.00000.0, Culture=neutral,
        PublicKeyToken=31bf3856ad364e35"
        UnloadOnIdle="true"
        />
        </Services>
        </WorkflowWithPersistence>
        </configuration>

        </pre>