/// <summary>
/// Subscribes a callback.
/// </summary>
/// <param name="callback"></param>
internal void Subscribe(IChangeRegisterCallback callback, object state)
{
if (callback == null)
{
throw new ArgumentNullException("callback ");
}
// add...
this.Registrations.Add(new ChangeRegistration(this, callback, state));
}
/// <summary>
/// Constructor.
/// </summary>
/// <param name="block"></param>
/// <param name="callback"></param>
/// <param name="state"></param>
internal ChangeRegistration(ChangeRegisterRegistrationsBlock block, IChangeRegisterCallback callback, object state)
{
if (block == null)
{
throw new ArgumentNullException("block");
}
if (callback == null)
{
throw new ArgumentNullException("callback");
}
_block = block;
_callback = callback;
}
