using System; using System.ComponentModel; using System.Collections.Generic; using System.Linq; using System.Text; using System.Diagnostics; using System.Windows; using System.Windows.Data; namespace BindingSample {
   class Program     {
   static void Main(string[] args)         {
   //1. Test Binding             View view1 = new View();             View view2 = new View();             ViewModel model = new ViewModel();             ViewModel2 model2 = new ViewModel2();             TextConverter converter = new TextConverter();             BindingEngine.SetPropertyBinding(view1, model, "Text", "Value", converter, null);             BindingEngine.SetPropertyBinding(view1, model, "Value", "Value");             BindingEngine.SetPropertyBinding(view2, model, "Text", "Value", converter, 2);             BindingEngine.SetPropertyBinding(view2, model, "Value", "Value");             BindingEngine.SetPropertyBinding(view2, model2, "Value2", "Value");             Console.WriteLine("Set Binding to view1 and view2");             Console.WriteLine("view1 Text = {0} \t Value = {1} \nview2 Text = {2} \t Value = {3} \t Value2 = {4}", view1.Text, view1.Value, view2.Text, view2.Value, view2.Value2);             model.Value = 1;             model2.Value = 4;             Console.WriteLine("\nSet model.Value = 1, model2 = 4");             Console.WriteLine("view1 Text = {0} \t Value = {1} \nview2 Text = {2} \t Value = {3} \t Value2 = {4}", view1.Text, view1.Value, view2.Text, view2.Value, view2.Value2);             Console.WriteLine("\nClear binding of view1");             BindingEngine.ClearPropertyBinding(view1, model, "Text", "Value");             BindingEngine.ClearPropertyBinding(view1, model, "Value", "Value");             model.Value = 3;             Console.WriteLine("\nSet model.Value = 3");             Console.WriteLine("view1 Text = {0} \t Value = {1} \nview2 Text = {2} \t Value = {3}", view1.Text, view1.Value, view2.Text, view2.Value); //2. Test memory leak             View view3 = new View();             ViewModel model3 = new ViewModel();             WeakReference wr = new WeakReference(view3);             BindingEngine.SetPropertyBinding(view3, model3, "Text", "Value", converter, null);             BindingEngine.SetPropertyBinding(view3, model3, "Value", "Value");             Console.WriteLine("\nSet Binding to view3");             Console.WriteLine("The view3 is alive : {0}", wr.IsAlive);             view3 = null;             GC.Collect();             GC.WaitForPendingFinalizers();             GC.Collect();             Console.WriteLine("Set view3 = null , after GC Collect");             Console.WriteLine("The view3 is alive : {0}", wr.IsAlive);             Console.Read();         }     } public class View     {
   public string Text { get; set; } public int Value { get; set; } public int Value2 { get; set; }     } public class ViewModel : INotifyPropertyChanged     {
   private int _Value = 0; public int Value         {
   get             {
   return _Value;             } set             {
                   _Value = value;                 NotifyPropertyChanged("Value");             }         } public event PropertyChangedEventHandler PropertyChanged; public void NotifyPropertyChanged(string prop)         {
   if (PropertyChanged != null)             {
                   PropertyChanged(this, new PropertyChangedEventArgs(prop));             }         }     } public class ViewModel2 : INotifyPropertyChanged     {
   private int _Value = 0; public int Value         {
   get             {
   return _Value;             } set             {
                   _Value = value;                 NotifyPropertyChanged("Value");             }         } public event PropertyChangedEventHandler PropertyChanged; public void NotifyPropertyChanged(string prop)         {
   if (PropertyChanged != null)             {
                   PropertyChanged(this, new PropertyChangedEventArgs(prop));             }         }     } public class TextConverter : IDataConverter     {
   public object Convert(object value, object parameter)         {
   int v = System.Convert.ToInt32(value); if (parameter != null)             {
                   v = System.Convert.ToInt32(parameter) + v;             } return string.Format("\"{0}\"", v);         }     } }