CRM 2011 Custom Workflow sample

 public class Test: CodeActivity {
 
#region Input Properties

[Input("Task Subject")]
[Default("Empty Subject")]
public InArgument<string> TaskSubject { get; set; }

[Input("Contract Lookup")]

[ReferenceTarget("contract")]

public InArgument<EntityReference>startContract { get; set;}



[Input("Contract Service Type Lookup")]

[ReferenceTarget("new_contractservicetype")]

public InArgument<EntityReference>contractServiceType { get; set; }



[Input("Component Template Lookup")]

[ReferenceTarget("new_componenttemplate")]

public InArgument<EntityReference>componentTemplate { get; set; }



[Output("Target Component")]

[ReferenceTarget("new_component")]

public OutArgument<EntityReference>targetComponent { get; set;}



[Output("Is Component Found Flag")]

public OutArgument<Boolean>IsFoundFlag { get; set;}






[Input("Activity Type")]

[AttributeTarget("appointment", "new_type")]

public InArgument<OptionSetValue>ActvType { get; set;}








[Input("End Date Time")]

public InArgument<DateTime>endDate { get; set;}

#endregion

 protected override void Execute(CodeActivityContext context) 

 {
 
      //Create the IWorkflowContext and the
     //IOrganizationService for communication with CRM
    IWorkflowContext workflowContext =context.GetExtension<IWorkflowContext>();
    IOrganizationServiceFactory Factory =context.GetExtension<IOrganizationServiceFactory>();
    IOrganizationService service =Factory .CreateOrganizationService(workflowContext.UserId);
   //Retrieve data from InputParameter 
    string newSubject = TaskSubject.Get<string>(context);
 
   //Create the new task object (in memory)
   Entity newTask = new Entity("task");
   newTask["subject"] = newSubject;
   newTask["regardingobjectid"] =new EntityReference("account", workflowContext.PrimaryEntity   Id);
 
   //Create task in CRM
   Guid taskId = service.Create(newTask);
  }
}