VB.net implementaion does not return Instnceid

I ran Asp.net implementaion of Hello World in VB.

ProtectedSub Button1_Click(ByVal senderAsObject,ByVal eAs System.EventArgs)Handles Button1.Click

Dim workflowRuntimeAs WorkflowRuntime = WorkflowWebRequestContext.Current.WorkflowRuntime

Dim schedulerAs ManualWorkflowSchedulerService = workflowRuntime.GetService(Of ManualWorkflowSchedulerService)()

Dim workflowTypeAs System.Type

AddHandler workflowRuntime.WorkflowCompleted,AddressOf WorkflowRuntime_WorkflowCompleted

' Load the workflow type

workflowType =GetType(WorkflowLibrary1.differentWorkflow)

' // dynamically load the workflow assembly

Dim WorkflowInstanceAs WorkflowInstance = workflowRuntime.CreateWorkflow(workflowType)

WorkflowInstance.Start()

' // Now run the workflow.This is necessary when using the ManualWorkflowSchedulerService

scheduler.RunWorkflow(WorkflowInstance.InstanceId)

Dim myguidAs System.Guid = WorkflowInstance.InstanceId' // Has null in it

EndSub

Where as the Asp.net implementaion of CS produces the result:

privatevoid StartSimpleWorkflow()

{

// Get a reference to the Workflow Runtime through the WorkflowWebHostingModule

// Http Module.

//

// NOTE:This requires the configuration section to be named "WorkflowRuntime".

WorkflowRuntime workflowRuntime =WorkflowWebRequestContext.Current.WorkflowRuntime;

// Now get a refernece to the ManualWorkflowSchedulerService

ManualWorkflowSchedulerService scheduler =

workflowRuntime.GetService<ManualWorkflowSchedulerService>();

// Attach to the WorkflowCompleted event

workflowRuntime.WorkflowCompleted +=

newEventHandler<WorkflowCompletedEventArgs>(WorkflowRuntime_WorkflowCompleted);

// Start the Workflow1

WorkflowInstance workflowInstance=workflowRuntime.CreateWorkflow(typeof(WorkflowLibrary1.differentWorkflow));

workflowInstance.Start();

// Now run the workflow.This is necessary when

// ...using the ManualWorkflowSchedulerService

scheduler.RunWorkflow(workflowInstance.InstanceId);

System.Guid myguid = workflowInstance.InstanceId;// This has the GUID that I need

}