Class which throttles an event pipeline. It offers unique event raising during a fixed interval. Instances collect events and with each interval only the unique events (last event first) from that batch are raised. Every event found in the batch which is equal to an already raised event (which has equal event arguments) is ignored. Use this class to limit a large amount of events which are equal and lead to e.g. repainting a UI, to act like a event instead. This can greatly increase performance in scenarios where events are used to manipulate UI objects or other objects and repetitive changes lead to the same situation (e.g. 100 times the event that an element has changed in a short time (e.g. 100ms) where each time a TreeNode is repainted because 'the element has changed' is redundant: the last event in the batch is enough, it already repaints the node completely).

Events are compared based on the event args, which are compared to event arguments already processed. Use one throttler per event handler.

public class EventThrottler<TElement, TEventArgs>
where TElement : class
where TEventArgs : EventArgs

Public Class EventThrottler(Of TElement As Class, TEventArgs As EventArgs)