I'm not associated with the Jurassic project, but ... What about Jurassic doesn't work in Mono?

There are numerous issues that bump out suddenly where you wouldn't expect them to bump out

For example these three lines are not working:

var engine = new Jurassic.ScriptEngine();
engine.SetGlobalFunction("test", new Func<int, int, int>((a, b) => a + b));
Console.WriteLine(engine.Evaluate<int>("test(5, 6)"));

System.MethodAccessException has been thrown:

Method Test.MainClass:<Main>m__0 (int,int)' is inaccessible from method(wrapper dynamic-method) object:binder_for_Test.MainClass.<Main>m__0 (Jurassic.ScriptEngine,object,object[])'

Previously there were other problem with DynamicMethod, in mono DynamicMethod is not implemented. So following one of discussions found here, I've changed the property in ScriptEngine.cs to the following code:

    internal static bool LowPrivilegeEnvironment
    {
        get
        {
            lock (lowPrivilegeEnvironmentLock)
            {
                if (lowPrivilegeEnvironmentTested == false)
                {
                    if (Type.GetType("Mono.Runtime") != null)
                    {
                        lowPrivilegeEnvironment = true;
                        lowPrivilegeEnvironmentTested = true;
                    }
                    else
                    {
                        var permission = new System.Security.Permissions.SecurityPermission(System.Security.Permissions.SecurityPermissionFlag.UnmanagedCode);
                        lowPrivilegeEnvironment = !System.Security.SecurityManager.IsGranted(permission);
                        lowPrivilegeEnvironmentTested = true;
                    }
                }
            }
            return lowPrivilegeEnvironment;
        }
    }

It helped with previous problem but posed new one....