How to Create a new instance of class under an AppDomain


I am trying to invoke a class to run under a separate AppDomain but I am getting an exception about noting being able to load the class or one of its dependencies. Here is an example of what I am doing.

AppDomain ad = AppDomain.CreateDomain("New domain");
IIdentity identity = new GenericIdentity("NewUser");
IPrincipal principal = new GenericPrincipal(identity, null);
TestClass remoteWorker = (TestClass)ad.CreateInstanceAndUnwrap(

In my separate TestProject I have one class named TestClass:

 public class TestClass : MarshalByRefObject
      public void Run(string name, string path)
           //Some stuff

I've checked all the paths for everything and they are correct. I am getting the error:

Could not load file or assembly 'K:\\Installer\\Bin\\TestProject.dll' 
or one of its dependencies. The given assembly name or codebase was invalid. 
(Exception from HRESULT: 0x80131047)

I've tried changing paths, moving it to the currently executing assembly. Still nothing. The DLL is located in K:\Installer\Bin\TestProject.dll. I am running this under admin so it has permissions to the Dll.

asked on Stack Overflow Jul 26, 2013 by busbina

1 Answer


Figured it out. Changed my code to this:

AppDomainSetup domainSetup = new AppDomainSetup 
                             {PrivateBinPath = binFolder+"\\TestProject.dll"};
AppDomain ad = AppDomain.CreateDomain("New domain",null, domainSetup);

TestClass remoteWorker = (TestClass)ad.CreateInstanceFromAndUnwrap(
                          typeof(TestClass ).FullName);
answered on Stack Overflow Jul 26, 2013 by busbina

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