Use AppDomain to load/unload external assemblies

Question

My scenario is as follows:

• Create new AppDomain
• Load some assemblies into it
• Do some magic with loaded dlls
• Unload AppDomain to rele

Answer 1

.Net uses non-deterministic finalization. If you want to see if the memory drops you should do ...

GC.Collect(); 
GC.WaitForPendingFinalizers();

... after the unload. Also unless you have a need to force collection (rather un-likely) you should allow the system to collect on its own. Normally if you feel the need to force collection in production code there is a resource leak typically caused by not calling Dispose on IDisposable objects or for not Releasing unmanaged objects

using (var imdisposable = new IDisposable())
{
}
//
var imdisposable = new IDisposable();
imdisposable.Dispose();
//
Marshal.Release(intPtr); 
//
Marshal.ReleaseComObject(comObject);