public void UnBind(TKey eventType, EventCallback <TValue> eventHandler)
{
EventCallback <TValue> callbacks;
if (dict.TryGetValue(eventType, out callbacks))
{
callbacks = (EventCallback <TValue>) EventCallback <TValue> .RemoveAll(callbacks, eventHandler);
if (callbacks == null)
{
dict.Remove(eventType);
}
else
{
dict[eventType] = callbacks;
}
}
}