/// <summary>
/// Determines whether the <see cref="T:System.Collections.Generic.IDictionary`2"/> contains an element with the specified key.
/// </summary>
/// <returns>
/// true if the <see cref="T:System.Collections.Generic.IDictionary`2"/> contains an element with the key; otherwise, false.
/// </returns>
/// <param name="key">The key to locate in the <see cref="T:System.Collections.Generic.IDictionary`2"/>.</param>
/// <exception cref="T:System.ArgumentNullException"><paramref name="key"/> is null.</exception>
public bool ContainsKey(TKey key)
{
if (key == null)
{
throw new ArgumentNullException("key");
}
return(_data.ContainsKey(key));
}
/// <summary>
/// Registers a callback to call when a specified property changes.
/// </summary>
/// <param name="property">The property to monitor.</param>
/// <param name="handler">The method to call when the property changes.</param>
public void AddPropertyChangedHandler(ModelProperty property, EventHandler <ModelPropertyChangedEventArgs> handler)
{
lock (_lockObject)
{
List <WeakAction <object, ModelPropertyChangedEventArgs> > handlers;
if (!_propertyChangedHandlers.TryGetValue(property.Key, out handlers))
{
handlers = new List <WeakAction <object, ModelPropertyChangedEventArgs> >();
_propertyChangedHandlers = _propertyChangedHandlers.AddOrUpdate(property.Key, handlers);
}
handlers.Add(new WeakAction <object, ModelPropertyChangedEventArgs>(handler.Method, handler.Target));
}
var uninitializedValue = property.DefaultValue as ModelProperty.UnitializedValue;
if (uninitializedValue != null && !_values.ContainsKey(property.Key))
{
var value = uninitializedValue.GetValue(this);
SetValueCore(property, value);
}
}
/// <summary>
/// Determines whether the collection contains the specified item.
/// </summary>
public bool Contains(T item)
{
return(_items.ContainsKey(item));
}