Workflow Foundation Project Using Visual Studio 2008 Express Edition

using System;
using System.ComponentModel;
using System.Workflow.Activities;

namespace FirstWF
{

        public sealed class SequentialWorkflow : SequentialWorkflowActivity
        {
            private IfElseActivity IsUnderLimitIfElseActivity;
            private IfElseBranchActivity YesIfElseBranch;
            private CodeActivity ApprovePO;
            private IfElseBranchActivity NoIfElseBranch;
            private CodeActivity RejectPO;

            /*
             * Initialization of the Activities for this Sequential Workflow
             * */
            public SequentialWorkflow()
            {
                this.CanModifyActivities = true;
                System.Workflow.Activities.CodeCondition codecondition1 = new System.Workflow.Activities.CodeCondition();
                this.IsUnderLimitIfElseActivity = new System.Workflow.Activities.IfElseActivity();
                this.YesIfElseBranch = new System.Workflow.Activities.IfElseBranchActivity();
                this.NoIfElseBranch = new System.Workflow.Activities.IfElseBranchActivity();
                this.ApprovePO = new System.Workflow.Activities.CodeActivity();
                this.RejectPO = new System.Workflow.Activities.CodeActivity();
                // 
                // IsUnderLimitIfElseActivity
                // 
                this.IsUnderLimitIfElseActivity.Activities.Add(this.YesIfElseBranch);
                this.IsUnderLimitIfElseActivity.Activities.Add(this.NoIfElseBranch);
                this.IsUnderLimitIfElseActivity.Name = "IsUnderLimitIfElseActivity";
                // 
                // YesIfElseBranch
                // 
                this.YesIfElseBranch.Activities.Add(this.ApprovePO);
                codecondition1.Condition += new System.EventHandler<System.Workflow.Activities.ConditionalEventArgs>(this.IsUnderLimit);
                this.YesIfElseBranch.Condition = codecondition1;
                this.YesIfElseBranch.Name = "YesIfElseBranch";
                // 
                // NoIfElseBranch
                // 
                this.NoIfElseBranch.Activities.Add(this.RejectPO);
                this.NoIfElseBranch.Name = "NoIfElseBranch";
                // 
                // ApprovePO
                // 
                this.ApprovePO.Name = "ApprovePO";
                this.ApprovePO.ExecuteCode += new System.EventHandler(this.OnApproved);
                // 
                // RejectPO
                // 
                this.RejectPO.Name = "RejectPO";
                this.RejectPO.ExecuteCode += new System.EventHandler(this.OnRejected);
                // 
                // SequentialWorkflow
                // 
                this.Activities.Add(this.IsUnderLimitIfElseActivity);
                this.Name = "SequentialWorkflow";
                this.CanModifyActivities = false;
            }

            // The event handler that executes on ExecuteCode event of the ApprovePO activity
            private void OnApproved(object sender, EventArgs e)
            {
                Console.WriteLine("Purchase Order Approved.");
            }

            // The event handler that executes on ExecuteCode event of the RejectPO activity
            private void OnRejected(object sender, EventArgs e)
            {
                Console.WriteLine("Purchase Order Rejected.");
            }

            // Code condition to evaluate whether to take the first branch, YesIfElseBranch
            // Since it always returns true, the first branch is always taken.
            private void IsUnderLimit(object sender, ConditionalEventArgs e)
            {
                e.Result = true;
            }
        }
}