protected override void RemoveItem(int index)
{
ModelItemKeyValuePair <TKey, TValue> item = this[index];
Fx.Assert(item != null, "Item should not be null.");
if (ShouldUpdateDictionary)
{
this.dictionary.Remove(item.Key);
}
base.RemoveItem(index);
}
public DictionaryItemsCollection(object dictionary)
{
this.ShouldUpdateDictionary = true;
this.dictionary = dictionary as IDictionary <TKey, TValue>;
Fx.Assert(this.dictionary != null, "dictionary should be instantiated");
foreach (KeyValuePair <TKey, TValue> kvpair in this.dictionary)
{
ModelItemKeyValuePair <TKey, TValue> item = new ModelItemKeyValuePair <TKey, TValue>(kvpair.Key, kvpair.Value);
item.collection = this;
base.InsertItem(this.Count, item);
}
}
protected override void SetItem(int index, ModelItemKeyValuePair <TKey, TValue> item)
{
if (item == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("item"));
}
item.collection = this;
ModelItemKeyValuePair <TKey, TValue> oldItem = this[index];
Fx.Assert(oldItem != null, "Item should not be null.");
this.PreUpdateKey(oldItem.Key, item.Key);
base.SetItem(index, item);
this.PostUpdateKey();
}
protected override void InsertItem(int index, ModelItemKeyValuePair <TKey, TValue> item)
{
if (item == null)
{
throw FxTrace.Exception.AsError(new ArgumentNullException("item"));
}
if (ShouldUpdateDictionary && this.dictionary.ContainsKey(item.Key))
{
throw FxTrace.Exception.AsError(new ArgumentException(SR.DuplicateKey));
}
item.collection = this;
base.InsertItem(index, item);
this.UpdateDictionary();
}