public bool TryGetValue(TKey key, out TValue value)
{
var result = KeyedEntryCollection.Contains(key);
value = result ? (TValue)KeyedEntryCollection[key].Value : default(TValue);
return(result);
}
protected int GetIndexAndEntryForKey(TKey key, out DictionaryEntry entry)
{
entry = new DictionaryEntry();
int index = -1;
if (KeyedEntryCollection.Contains(key))
{
entry = KeyedEntryCollection[key];
index = KeyedEntryCollection.IndexOf(entry);
}
return(index);
}
protected virtual bool SetEntry(TKey key, TValue value)
{
var keyExists = KeyedEntryCollection.Contains(key);
// if identical key/value pair already exists, nothing to do
if (keyExists && value.Equals((TValue)KeyedEntryCollection[key].Value))
{
return(false);
}
// otherwise, remove the existing entry
if (keyExists)
{
KeyedEntryCollection.Remove(key);
}
// add the new entry
KeyedEntryCollection.Add(new DictionaryEntry(key, value));
return(true);
}
protected override bool SetEntry(TKey key, TValue value)
{
var keyExists = KeyedEntryCollection.Contains(key);
// if identical key/value pair already exists, nothing to do
if (keyExists && value.Equals((TValue)KeyedEntryCollection[key].Value))
{
return(false);
}
// otherwise, remove the existing entry
if (keyExists)
{
KeyedEntryCollection.Remove(key);
}
// add the new entry
var entry = new DictionaryEntry(key, value);
var index = GetInsertionIndexForEntry(entry);
KeyedEntryCollection.Insert(index, entry);
return(true);
}
bool IDictionary <TKey, TValue> .ContainsKey(TKey key)
{
return(KeyedEntryCollection.Contains(key));
}
bool ICollection <KeyValuePair <TKey, TValue> > .Contains(KeyValuePair <TKey, TValue> kvp)
{
return(KeyedEntryCollection.Contains(kvp.Key));
}
bool IDictionary.Contains(object key)
{
return(KeyedEntryCollection.Contains((TKey)key));
}
public bool ContainsKey(TKey key)
{
return(KeyedEntryCollection.Contains(key));
}