1. In the Program file, import the System.Workflow.Runtime.Tracking namespace so that you can use the types in that namespace.

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   using System.Workflow.Runtime.Tracking;
   
   

2. In the Program class, create a static Int32 field named maxSimultaneousWorkflows, and assign it the value 1.

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   static int maxSimultaneousWorkflows = 1;
   
   

3. In the Main method that is defined in the Program class, add the DefaultWorkflowSchedulerService to the WorkflowRuntime.

   Use the AddService method, and pass the number of maximum simultaneous workflows that the DefaultWorkflowSchedulerService can schedule as a parameter.

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   workflowRuntime.AddService(
       new DefaultWorkflowSchedulerService(maxSimultaneousWorkflows));
   
   

   For more information on this value and the DefaultWorkflowSchedulerService, see Using DefaultWorkflowSchedulerService.

For information about compiling your code, see Compiling the Code.

In Task 2: Configure Runtime Services using App.Config, you use an application configuration file to add services to the Windows Workflow Foundation.

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