/// <summary>
/// Adds a binding.
/// </summary>
/// <param name="binding">The binding to add.</param>
/// <returns>A disposable used to remove the binding.</returns>
public IDisposable Add(IObservable <object> binding)
{
Contract.Requires <ArgumentNullException>(binding != null);
var entry = new PriorityBindingEntry(_nextIndex++);
var node = Bindings.AddFirst(entry);
entry.Start(binding, Changed, Completed);
return(Disposable.Create(() =>
{
Bindings.Remove(node);
entry.Dispose();
if (entry.Index >= ActiveBindingIndex)
{
ActivateFirstBinding();
}
}));
}
