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  1. using System;
  2. using System.Collections.Generic;
  3.  
  4. public class Program
  5. {
  6.     public static void Main()
  7.     {
  8.         var a = new A();
  9.         a.Controls.Add(new B());
  10.         a.Controls.Add(new C());
  11.         a.Controls.Add(new D());
  12.         a.DisplayMode = DisplayMode.Edit;
  13.  
  14.         Console.WriteLine("After setting display mode:");
  15.         foreach (var c in a.Controls)
  16.             Console.WriteLine(c);
  17.     }
  18. }
  19. public enum DisplayMode
  20. {
  21.     View = 0,
  22.     Edit = 1
  23. }
  24.  
  25. public interface IMode
  26. {
  27.     DisplayMode DisplayMode { get; set; }
  28. }
  29.  
  30. public class A
  31. {
  32.     private DisplayMode mDisplayMode;
  33.     public A()
  34.     {
  35.         mDisplayMode = DisplayMode.View;
  36.         Controls = new List<object>();
  37.     }
  38.     public DisplayMode DisplayMode
  39.     {
  40.         get
  41.         {
  42.             return mDisplayMode;
  43.         }
  44.         set
  45.         {
  46.             if (mDisplayMode != value)
  47.             {
  48.                 mDisplayMode = value;
  49.                 foreach (var control in Controls)
  50.                     if (control is IMode)
  51.                         (control as IMode).DisplayMode = value;
  52.                 // the control ( b ).DisplayMode is not firing or executing the set
  53.                 // what i am missing here?
  54.             }
  55.         }
  56.     }
  57.     public List<object> Controls { get; set; }
  58. }
  59.  
  60. public class B : IMode
  61. {
  62.     private DisplayMode mDisplayMode;
  63.     public B()
  64.     {
  65.         X=0;
  66.         mDisplayMode=DisplayMode.View;
  67.     }
  68.  
  69.     public int X { get ; set;}
  70.  
  71.     public DisplayMode DisplayMode
  72.     {
  73.         get
  74.         {
  75.             return mDisplayMode;
  76.         }
  77.         set
  78.         {
  79.             if (mDisplayMode != value)
  80.             {
  81.                 mDisplayMode = value;
  82.                 Console.WriteLine("Setting X = 10");
  83.                 X=10;
  84.             }
  85.         }
  86.     }
  87.  
  88.     public override string ToString()
  89.     {
  90.     	return "Object B : X = " + X;
  91.     }
  92. }
  93.  
  94. public class C {}
  95.  
  96. public class D {}
Success #stdin #stdout 0.03s 33904KB
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stdin
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Standard input is empty
stdout
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Setting X = 10
After setting display mode:
Object B : X = 10
C
D
https://ideone.com/F4avKu
language:
C# (gmcs 5.20.1)
created:
9 years ago
visibility:
public

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