/// <summary>
/// Initializes a new instance of the <see cref="ObservableHashedCollection{TKey, TValue}"/> class.
/// </summary>
public ObservableHashedCollection()
{
_context = SynchronizationContext.Current;
_hashedCollection = new HashedCollection <TKey, TValue>(new List <KeyValuePair <TKey, TValue> >());
}
/// <summary>
/// Initializes a new instance of the <see cref="ObservableHashedCollection{TKey, TValue}"/> class.
/// </summary>
/// <param name="collection">The initial items in the collection.</param>
public ObservableHashedCollection(ICollection <KeyValuePair <TKey, TValue> > collection)
{
_context = SynchronizationContext.Current;
_hashedCollection = new HashedCollection <TKey, TValue>(collection);
}