protected virtual void OnUpdate(
	TimeSpan deltaTime
)

Protected Overridable Sub OnUpdate ( 
	deltaTime As TimeSpan
)

protected:
virtual void OnUpdate(
	TimeSpan deltaTime
)

abstract OnUpdate : 
        deltaTime : TimeSpan -> unit 
override OnUpdate : 
        deltaTime : TimeSpan -> unit 

Notes to Inheritors:
This method is called by Update(TimeSpan) to do the actual work. This method is only called if the particle system is Enabled and not delaying. The base implementation calls BeginUpdate(TimeSpan) of the effectors. Then the particle ages (particle parameter "NormalizedAge") are updated. Next UpdateParticles(TimeSpan, Int32, Int32) of the effectors is called to update the particle states. After that the child Children are updated. Finally ParticleStartIndex, NumberOfActiveParticles and NumberOfLivingParticles are updated and EndUpdate(TimeSpan) of the effectors is called.