Description
CannotUnloadAppDomainException is thrown when there is an attempt to unload:
The default application domain, which must remain loaded during the lifetime of the application. An application domain with a running thread that cannot immediately stop execution. An application domain that has already been unloaded.
Example
using System;
using System.Threading;
/// <summary>
/// Shows why a CannotUnloadAppDomainException is thrown
/// and how to handle it
/// </summary>
public class CannotUnloadAppDomainExceptionSample
{
public static void Main()
{
try
{
AppDomain ad = Thread.GetDomain();
AppDomain.Unload(ad);
}
catch (CannotUnloadAppDomainException e)
{
Console.WriteLine("Caught exception: {0} - '{1}'", e.GetType().Name, e.Message);
}
Console.WriteLine();
Console.WriteLine();
Console.WriteLine("Press Enter to continue"); Console.ReadLine();
}
}
The output is
Caught exception: CannotUnloadAppDomainException - 'The default domain can not be unloaded.'
Press Enter to continue
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