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POUse AppDomain to load/unload external assemblies
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  1. POUse AppDomain to load/unload external assemblies
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    copied!<p>My scenario is as follows:</p> <ul> <li>Create new AppDomain</li> <li>Load some assemblies into it</li> <li>Do some magic with loaded dlls</li> <li>Unload AppDomain to release memory &amp; loaded libraries</li> </ul> <p>Below is the code that I'm trying to use</p> <pre><code> class Program { static void Main(string[] args) { Evidence e = new Evidence(AppDomain.CurrentDomain.Evidence); AppDomainSetup setup = AppDomain.CurrentDomain.SetupInformation; Console.WriteLine("Creating new AppDomain"); AppDomain newDomain = AppDomain.CreateDomain("newDomain", e, setup); string fullName = Assembly.GetExecutingAssembly().FullName; Type loaderType = typeof(AssemblyLoader); var loader = (AssemblyLoader)newDomain.CreateInstanceFrom(loaderType.Assembly.Location, loaderType.FullName).Unwrap(); Console.WriteLine("Loading assembly"); Assembly asm = loader.LoadAssembly("library.dll"); Console.WriteLine("Creating instance of Class1"); object instance = Activator.CreateInstance(asm.GetTypes()[0]); Console.WriteLine("Created object is of type {0}", instance.GetType()); Console.ReadLine(); Console.WriteLine("Unloading AppDomain"); instance = null; AppDomain.Unload(newDomain); Console.WriteLine("New Domain unloaded"); Console.ReadLine(); } public class AssemblyLoader : MarshalByRefObject { public Assembly LoadAssembly(string path) { return Assembly.LoadFile(path); } } } </code></pre> <p><em>library.dll</em> consists only of a single dummy class, with one huge string table(for easier tracking the memory consumption)</p> <p>Now the problem is that memory actually isn't freed. What's more surprising, memory usage actually increases after AppDomain.Unload()</p> <p>Can anyone shed some light on this issue?</p>
 

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