mcs/class/referencesource/System.Activities.Presentation/System.Activities.Presentation/System/Activities/Presentation/ModelItemKeyValuePair.cs

   1 //-----------------------------------------------------------------------------
   2 // Copyright (c) Microsoft Corporation.  All rights reserved.
   3 //-----------------------------------------------------------------------------
   4
   5 namespace System.Activities.Presentation
   6 {
   7     using System.Collections.ObjectModel;
   8     using System.Collections.Generic;
   9     using System.Runtime;
  10
  11     class ModelItemKeyValuePair<TKey, TValue>
  12     {
  13         internal DictionaryItemsCollection<TKey, TValue> collection;
  14
  15         TKey key;
  16
  17         TValue value;
  18
  19         public ModelItemKeyValuePair()
  20         {
  21         }
  22
  23         public ModelItemKeyValuePair(TKey key, TValue value)
  24         {
  25             this.key = key;
  26             this.value = value;
  27         }
  28
  29         [Fx.Tag.KnownXamlExternal]
  30         public TKey Key
  31         {
  32             get
  33             {
  34                 return this.key;
  35             }
  36             set
  37             {
  38                 if (this.collection != null)
  39                 {
  40                     this.collection.PreUpdateKey(this.key, value);
  41                 }
  42                 this.key = value;
  43                 if (this.collection != null)
  44                 {
  45                     this.collection.PostUpdateKey();
  46                 }
  47             }
  48         }
  49
  50         [Fx.Tag.KnownXamlExternal]
  51         public TValue Value
  52         {
  53             get
  54             {
  55                 return this.value;
  56             }
  57             set
  58             {
  59                 if (this.collection != null)
  60                 {
  61                     this.collection.UpdateValue(this.key, value);
  62                 }
  63                 this.value = value;
  64             }
  65         }
  66     }
  67 }