I\'m experimenting ideas around using AppDomain to manage some legacy code contains lots of static fields in a multi-threaded environment.
I read answers this questi
It looks like you are loading a type from another appDomain into the current appDomain. Thus the code that calls the static methods are calling from the current appDomain.
I'm unaware of any other way to call a static method in another domain without creating an instance of an object in another domain, and having that object call the static method.
Example: Solution contains 2 Projects (ClassLibrary and a Winforms/Console app)
[ClassLibrary]
using System;
namespace MyLibrary
{
public class DomainObject : MarshalByRefObject
{
private static int _Value;
private static void IncrementValue()
{
DomainObject._Value++;
}
public static int Value
{
get
{
return DomainObject._Value;
}
}
public int GetIncrementedValue()
{
DomainObject.IncrementValue();
return DomainObject.Value;
}
}
}
[Application]
private void button1_Click(object sender, EventArgs e)
{
AppDomain domain1 = AppDomain.CreateDomain("domain1");
AppDomain domain2 = AppDomain.CreateDomain("domain2");
DomainObject object1 =
domain1.CreateInstanceAndUnwrap("MyLibrary", "MyLibrary.DomainObject")
as DomainObject;
DomainObject object2 =
domain2.CreateInstanceAndUnwrap("MyLibrary", "MyLibrary.DomainObject")
as DomainObject;
if (object1 != null)
{
Console.WriteLine("object 1 Value = "
+ object1.GetIncrementedValue().ToString());
Console.WriteLine("object 1 Value = "
+ object1.GetIncrementedValue().ToString());
Console.WriteLine("object 1 Value = "
+ object1.GetIncrementedValue().ToString());
}
if (object2 != null)
{
Console.WriteLine("object 2 Value = "
+ object2.GetIncrementedValue().ToString());
Console.WriteLine("object 2 Value = "
+ object2.GetIncrementedValue().ToString());
Console.WriteLine("object 2 Value = "
+ object2.GetIncrementedValue().ToString());
}
/* Unload the Domain and re-create
* This should reset the Static Value in the AppDomain
*/
AppDomain.Unload(domain1);
domain1 = AppDomain.CreateDomain("domain1");
object1 = domain1.CreateInstanceAndUnwrap("MyLibrary",
"MyLibrary.DomainObject")
as DomainObject;
if (object1 != null)
{
Console.WriteLine("object 1 Value = "
+ object1.GetIncrementedValue().ToString());
Console.WriteLine("object 1 Value = "
+ object1.GetIncrementedValue().ToString());
Console.WriteLine("object 1 Value = "
+ object1.GetIncrementedValue().ToString());
}
if (object2 != null)
{
Console.WriteLine("object 2 Value = "
+ object2.GetIncrementedValue().ToString());
Console.WriteLine("object 2 Value = "
+ object2.GetIncrementedValue().ToString());
Console.WriteLine("object 2 Value = "
+ object2.GetIncrementedValue().ToString());
}
}
Generated Results:
object 1 Value = 1
object 1 Value = 2
object 1 Value = 3
object 2 Value = 1
object 2 Value = 2
object 2 Value = 3
object 1 Value = 1
object 1 Value = 2
object 1 Value = 3
object 2 Value = 4
object 2 Value = 5
object 2 Value = 6