> Is it true that when the form is close() that Garbage Collection will eventually remove the memory used by the instance of these 3 >classes?
>
>
Most of the time. Take a look at this

http://lyontamers.com/blogs/jimlyon/archive/2008/08/29/garbage-collection-finalizers-and-dispose-what-every-c-programmer-should-know.aspx

and this

http://www.bluebytesoftware.com/blog/PermaLink.aspx?guid=88e62cdf-5919-4ac7-bc33-20c06ae539ae

bruce