[Closed] Heap Size

In my code (maxGC or DotnetGC) does not free local or global array. Where is the problem? collecting buttons in a local variable? How I can collect buttons in array and destroy it later?

rollout HeapSizeRol "HeapSize Rol" width:459 height:395
(
	dotNetControl FLP_Buttons "flowLayoutPanel" pos:[2,6] width:454 height:329
	button btn_Update "Update" pos:[5,339] width:159 height:50
	label lbl_HeapFree "HeapFree:" pos:[170,338] width:285 height:16
	label lbl_MaxGC "MaxGC took:" pos:[170,357] width:285 height:16
	label lbl_DNGC "DNGC took:" pos:[170,376] width:285 height:16
	
	local MyButtons = #()
	
	fn UpdateButtons = 
	(
		FLP_Buttons.controls.clear()
		for i=1 to 100 do 
		(
			b = dotNetObject "Button"
			FLP_Buttons.controls.add b
-- 			dotNet.setLifetimeControl b #dotnet
			append MyButtons b 
		)
	)
	
	fn MaxGC = 
	(
		start = timeStamp()
		gc light:true
		end = timeStamp()
		lbl_MaxGC.text = "MaxGC took "+(((end - start) / 1000.0) as string)+" seconds
" 
	)

	fn DNGC = 
	(
		start = timeStamp()
		(dotnetClass "System.GC").Collect()
		end = timeStamp()
		lbl_DNGC.text = "DNGC took "+(((end - start) / 1000.0) as string)+" seconds
" 
	)
	
	on btn_Update pressed do
	(
		MaxGC()
		DNGC()
		
		UpdateButtons()
		
		lbl_HeapFree.text = "HeapFree:"+(heapfree as string)
	)
	
	on HeapSizeRol open do 
	(
		FLP_Buttons.autoScroll = true
	)
	
)
createdialog HeapSizeRol