/// <summary>
/// Adds the specified key.
/// </summary>
/// <param name="key">The key.</param>
/// <param name="item">The item.</param>
/// <exception cref="System.Exception">Key already exist</exception>
public virtual void Add(string key, T item)
{
if (_keys.Contains(key))
{
throw new Exception("Key already exist");
}
_keys.Add(key);
int index = _items.Add(item);
if (ItemAdd != null)
{
ItemAdd(this, new KeyedCollectionAddEventArgs(_items[index], index, _keys[index]));
}
if (CollectionChanged != null)
{
CollectionChanged(this, new EventArgs());
}
}
/// <summary>
/// Determines whether [contains] [the specified item].
/// </summary>
/// <param name="item">The item.</param>
/// <returns><c>true</c> if [contains] [the specified item]; otherwise, <c>false</c>.</returns>
public virtual bool Contains(T item)
{
return(_items.Contains(item));
}