How to pass a variable from one app domain to another

Question

Hello. I'd like to know, if I have a variable,for example, a string, how to pass its value to my new app domain:

static string _str;

static void Main(string[] args) {
    _str = "abc";
    AppDomain domain = AppDomain.CreateDomain("Domain666");
    domain.DoCallBack(MyNewAppDomainMethod);
    AppDomain.Unload(domain);
    Console.WriteLine("Finished");
    Console.ReadKey();
}

static void MyNewAppDomainMethod() {
    Console.WriteLine(_str); //want this to print "abc"
}

Thanks

Answer 1

Use one of the variations of AppDomain.CreateDomain that takes an AppDomainSetup argument. In the AppDomainSetup object, set the AppDomainInitializerArguments member to the string array you want passed to the new app domain.

See sample code at http://msdn.microsoft.com/en-us/library/system.appdomainsetup.appdomaininitializerarguments.aspx.

With the code in the question, the change might look like (not tested):

static voide Main(string[] args) {
    _str = "abc";

    AppDomainSetup setup = new AppDomainSetup();
    setup.AppDomainInitializer = new AppDomainInitializer(MyNewAppDomainMethod);
    setup.AppDomainInitializerArguments = new string[] { _str };

    AppDomain domain = new AppDomain(
        "Domain666",
        new Evidence(AppDomain.CurrentDomain.Evidence),
        setup);

    Console.WriteLine("Finished");
    Console.ReadKey();
}

static void MyNewAppDomainMethod(string[] args) {
    ...
}