Appdomain not woking with .net 6?

Question

So I have been following the tutorial at https://docs.microsoft.com/en-us/previous-versions/dotnet/framework/code-access-security/how-to-run-partially-trusted-code-in-a-sandbox?redirectedfrom=MSDN to run untrusted code in a test environment with Appdomain, but I'm having trouble with AppDomainSetup constructor and the ApplicationBase property. This is basically the code included in the tutorial :

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.IO;
using System.Security;
using System.Security.Policy;
using System.Security.Permissions;
using System.Reflection;
using System.Runtime.Remoting;



//The Sandboxer class needs to derive from MarshalByRefObject so that we can create it in another
// AppDomain and refer to it from the default AppDomain.
class Sandboxer 
{
    const string pathToUntrusted = @"..\..\..\UntrustedCode\bin\Debug";
    const string untrustedAssembly = "UntrustedCode";
    const string untrustedClass = "UntrustedCode.UntrustedClass";
    const string entryPoint = "IsFibonacci";
    private static Object[] parameters = { 45 };
    static void Main()
    {
        
        AppDomainSetup adSetup = new AppDomainSetup; **//Getting an error here that the constructor doesn't take 0 argumnets**
        adSetup.ApplicationBase = Path.GetFullPath(pathToUntrusted);//Similar error here

       
        PermissionSet permSet = new PermissionSet(PermissionState.None);
        permSet.AddPermission(new SecurityPermission(SecurityPermissionFlag.Execution));

      
        StrongName fullTrustAssembly = typeof(Sandboxer).Assembly.Evidence.GetHostEvidence<StrongName>();

        
        AppDomain newDomain = AppDomain.CreateDomain("Sandbox", null, adSetup, permSet, fullTrustAssembly); //another error here,

        
        ObjectHandle handle = Activator.CreateInstanceFrom(
            newDomain, typeof(Sandboxer).Assembly.ManifestModule.FullyQualifiedName,
            typeof(Sandboxer).FullName
            );
        
        Sandboxer newDomainInstance = (Sandboxer)handle.Unwrap();
        newDomainInstance.ExecuteUntrustedCode(untrustedAssembly, untrustedClass, entryPoint, parameters);
    }
    public void ExecuteUntrustedCode(string assemblyName, string typeName, string entryPoint, Object[] parameters)
    {
        
       
        MethodInfo target = Assembly.Load(assemblyName).GetType(typeName).GetMethod(entryPoint);
        try
        {
            
            bool retVal = (bool)target.Invoke(null, parameters);
        }
        catch (Exception ex)
        {
            
            new PermissionSet(PermissionState.Unrestricted).Assert();
            Console.WriteLine("SecurityException caught:\n{0}", ex.ToString());
            CodeAccessPermission.RevertAssert();
            Console.ReadLine();
        }
    }
}

Am I missing a library or something here? If this tutorial is outdated or something, could someone help me with an up-to-date one ? Thanks in advance :) .