public static void UnSubscribe(IOperationObserver observer, BaseOperation operation)
{
if (AllObservers.Keys.Contains(operation.Name))
{
AllObservers[operation.Name].Remove(observer);
}
}
// implementing subject interface
public static void Subscribe(IOperationObserver observer, BaseOperation operation)
{
if (!AllObservers.Keys.Contains(operation.Name))
{
AllObservers.Add(operation.Name, new List <IOperationObserver>());
}
if (!AllObservers[operation.Name].Contains(observer))
{
AllObservers[operation.Name].Add(observer);
}
}