public NullAwareDictionary(KeyValuePair <TKey, TValue>[] dictionary)
{
if (dictionary == null)
{
throw new ArgumentNullException(nameof(dictionary), "dictionary is null.");
}
_hasNull = false;
_valueForNull = new[] { default(TValue) };
_valueComparer = EqualityComparer <TValue> .Default;
if (typeof(TKey).CanBeNull())
{
Keys = new ConditionalExtendedList <TKey>(new[] { default(TKey) }, _wrapped.Keys, () => _hasNull, null);
Values = new ConditionalExtendedList <TValue>(_valueForNull, _wrapped.Values, () => _hasNull, null);
}
else
{
Keys = new ProxyCollection <TKey>(() => _wrapped.Keys).AsReadOnlyICollection;
Values = new ProxyCollection <TValue>(() => _wrapped.Values).AsReadOnlyICollection;
}
AsReadOnly = new ReadOnlyDictionary <TKey, TValue>(this);
foreach (var pair in dictionary)
{
Add(pair.Key, pair.Value);
}
}
public NullAwareDictionary(IEqualityComparer <TKey> comparer)
{
_wrapped = new Dictionary <TKey, TValue>(comparer);
_hasNull = false;
_valueForNull = new[] { default(TValue) };
_valueComparer = EqualityComparer <TValue> .Default;
if (typeof(TKey).CanBeNull())
{
Keys = new ConditionalExtendedList <TKey>(new[] { default(TKey) }, _wrapped.Keys, () => _hasNull, null);
Values = new ConditionalExtendedList <TValue>(_valueForNull, _wrapped.Values, () => _hasNull, null);
}
else
{
Keys = new ProxyCollection <TKey>(() => _wrapped.Keys).AsReadOnlyICollection;
Values = new ProxyCollection <TValue>(() => _wrapped.Values).AsReadOnlyICollection;
}
AsReadOnly = new ReadOnlyDictionary <TKey, TValue>(this);
}