Csharp/C Sharp/Development Class/AppDomain

AppDomain.CreateDomain

<source lang="csharp">

using System;

   class MainClass
   {
       public static void Main()
       {
           AppDomainSetup setupInfo = new AppDomainSetup();
           setupInfo.ApplicationBase = @"C:\MyRootDirectory";
           setupInfo.ConfigurationFile = "MyApp.config";
           setupInfo.PrivateBinPath = "bin;plugins;external";
           AppDomain newDomain = AppDomain.CreateDomain("My New AppDomain", null, setupInfo);
       }
   }
</source>

Configure the AppDomainSetup

<source lang="csharp"> using System; class Test {

   public static void Main()
   {
       AppDomainSetup setupInfo = new AppDomainSetup();
       setupInfo.ApplicationBase = @"C:\MyRootDirectory";
       setupInfo.ConfigurationFile = "MyApp.config";
       setupInfo.PrivateBinPath = "bin;plugins;external";
       AppDomain newDomain = 
           AppDomain.CreateDomain("My New AppDomain", null, setupInfo);
   }

}

      </source>

creates three instances of the same type. A local and two remote proxies to object instances are constructed:

<source lang="csharp"> using System; using System.Reflection; using System.Runtime.Remoting;

class MyClass {

   public void MethodA(DateTime dt) {
       Console.WriteLine("MethodA invoked at " + dt.ToLongTimeString());
   }

} class Starter {

   static void Main() {
       CreateLocal();
       CreateRemote1();
       CreateRemote2();
   }
   static void CreateLocal() {
       object obj = Activator.CreateInstance(typeof(MyClass));
       ((MyClass)obj).MethodA(DateTime.Now);
   }
   static void CreateRemote1() {
       ObjectHandle hObj = Activator.CreateInstance("library","MyClass");
       object obj = hObj.Unwrap();
       MethodInfo method = obj.GetType().GetMethod("MethodA");
       method.Invoke(obj, new object[1] { DateTime.Now });
   }
   static void CreateRemote2() {
       AppDomain domain = AppDomain.CurrentDomain;
       object obj = domain.CreateInstanceFromAndUnwrap("library.dll","MyClass");
       MethodInfo method = obj.GetType().GetMethod("MethodA");
       method.Invoke(obj, new object[1] { DateTime.Now });
   }

}

</source>

FriendlyName

<source lang="csharp"> using System; using System.Collections.Generic; using System.Text; class Program {

   static void Main(string[] args) {
       AppDomain currentDomain = AppDomain.CurrentDomain;
       Console.WriteLine(currentDomain.FriendlyName);
       AppDomain secondDomain = AppDomain.CreateDomain("New AppDomain");
       secondDomain.CreateInstance("AssemblyA", "AppDomains.Demo", true,System.Reflection.BindingFlags.CreateInstance, null, new object[] { 7, 3 }, null, null, null);
   }

}

</source>

OnUnhandledException method is added to the AppDomain.UnhandledException event

<source lang="csharp"> using System; public class Starter {

   public static void Main() {
       AppDomain.CurrentDomain.UnhandledException += new UnhandledExceptionEventHandler(OnUnhandledException);
       int vara = 5, varb = 0;
       vara /= varb;
   }
   public static void OnUnhandledException(
           object sender, UnhandledExceptionEventArgs e) {
       string application_name = sender.ToString();
       Exception except = (Exception)e.ExceptionObject;
       string errormessage = "Application " + application_name +
           " [ Exception " + except.Message + " ]";
       Console.WriteLine(errormessage);
   }

}

</source>

SetData, GetData

<source lang="csharp"> using System; using System.Reflection; using System.Collections; class ListModifier{

   public ListModifier()
   {
       ArrayList list = (ArrayList)AppDomain.CurrentDomain.GetData("Pets");
       list.Add("turtle");
   }

} class MainClass{

     public static void Main(){
         AppDomain domain = AppDomain.CreateDomain("Test");
         ArrayList list = new ArrayList();
         list.Add("dog");
         list.Add("cat");
         list.Add("fish");
         domain.SetData("Pets", list);
         domain.CreateInstance("MainClass","Apress.VisualCSharpRecipes.Chapter03.ListModifier");
         foreach (string s in (ArrayList)domain.GetData("Pets")) {
             Console.WriteLine(s);
         }
     }

}

</source>

SetPrincipalPolicy

<source lang="csharp"> using System; using System.Security; using System.Security.Principal; using System.Security.Permissions; class Program {

   static void Main(string[] args) {
       AppDomain.CurrentDomain.SetPrincipalPolicy(PrincipalPolicy.WindowsPrincipal);
       try {
           ShowMessage();
       } catch (SecurityException exception) {
           Console.WriteLine(exception.Message);
       }
   }
   [PrincipalPermissionAttribute(SecurityAction.Demand,Role = "BUILTIN\\Users")]
   static void ShowMessage() {
       Console.WriteLine("The current principal is logged in locally ");
       Console.WriteLine("(they are a member of the local Users group)");
   }

}

</source>