Implementing Wizard Functionality for Windows Phone 7 Applications

using System.Threading;
using WizardLibrary;
using MVVMSample1.ViewModel.WizardContent.WizardData;
using GalaSoft.MvvmLight.Threading;

namespace MVVMSample1.ViewModel.CustomWizards
{
    public class AdvancedWizard:DerivedWizard
    {
        public AdvancedWizard()
        {
            Title = "Advanced Wizard Title";
        }

        private bool isBusy;

        public bool IsBusy
        {
            get { return isBusy; }
            set
            {
                if (IsBusy == value)
                    return;
                isBusy = value;
                NotifyPropertyChanged("IsBusy");
            }
        }

        public override void Next()
        {
            //do some async work
            Thread th = new Thread((ThreadStart)(() =>
            {
                Thread.Sleep(4000);
                //process the data (set up the next step)
                DispatcherHelper.UIDispatcher.BeginInvoke(() =>
                {
                    int idx = Steps.IndexOf(CurrentStep);
                    if (idx < Steps.Count)
                    {//set the content for the next step
                        WizardStep vm = Steps[idx + 1];
                        if (idx == 0)
                        {
                            vm.Content = new SecondPageViewModel();
                        }
                        else if (idx == 1)
                        {
                            vm.Content = new ThirdPageViewModel();
                        }
                    }
                    IsBusy = false;
                    //call base version to move to the next step
                    base.Next();
                });
            }));
            th.IsBackground = true;
            th.Start();
            IsBusy = true;
        }
    }
}