public void AddCustomHandlers (ICommandTargetHandler handlerChain, ICommandArrayTargetHandler arrayHandlerChain)
{
this.customHandlerChain = handlerChain;
this.customArrayHandlerChain = arrayHandlerChain;
}
ICommandTargetHandler ChainHandler (ICommandTargetHandler chain, object attr)
{
ICommandTargetHandler h = attr as ICommandTargetHandler;
if (h == null) return chain;
h.Next = chain ?? DefaultCommandHandler.Instance;
return h;
}