Sample Download : http://code.msdn.microsoft.com/VBWF4SequenceWF-c2e9960c 

This sample demonstrates the usage of WF4 Sequence workflow in a Guess Number Game workflow. this sample will also involve the usage of Variable, IFElse Activity, DoWhile Activity and Customized Activity.

Imports System.Activities
Namespace VBWF4SequenceWF
   Public NotInheritable Class ReadNumberActivity
       Inherits CodeActivity
       ' Define an activity out argument of type int
       Public Property playerInputNumber() As OutArgument(Of Int32)
           Get
               Return _playerInputNumber
           End Get
           Set(ByVal value As OutArgument(Of Integer))
               _playerInputNumber = value
           End Set
       End Property
       Private _playerInputNumber As OutArgument(Of Integer)
       Protected Overrides Sub Execute(ByVal context As CodeActivityContext)
           playerInputNumber.Set(context, Int32.Parse(Console.ReadLine()))
       End Sub
   End Class
End Namespace

For detailed introduction of the sample, please read the documentation at http://code.msdn.microsoft.com/VBWF4SequenceWF-c2e9960c

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