OnRender() e OnRenderChanged()

[giogio1]

Is there any chance that OnRender() and OnRenderChanged() could be called at the same time?
In other words is there any chance that a dxBrush, or an array of dxBrush, allocated inside OnRenderChanged() could change and become invalid inside a call to onRender(), and therefore trigger an exception ?

And also does this code

            if (submissionAccount.Positions.Where(o => o.Instrument == Instrument).Count() > 0)
            {
                accountPosition = submissionAccount.Positions.Where(o => o.Instrument == Instrument).Last();
            }
​

need to be in a lock() block?

Thank You

[NinjaTrader_ChelseaB]

Hello giogio1,

From my understanding OnRenderTargetChanged() will always run before OnRender(). There would not be a chance a resource created and assigned from OnRenderTargetChanged() would be invalid in OnRender().

The purpose of OnRenderTargetChanged() is to prepare resources for OnRender().

The account positions access could need a lock, but we would suggest making a copy of the collection with .ToList() before enumerating over the copy list.