Lock a part of code for any instances

Can I lock a part of code for any instances ?

consider this

 public bool method1()
    {
        lock (this)
        {
            Thread.Sleep(15000);
            return true;
        }
    }

and then in First project I call it as :

        Assembly testAssembly = Assembly.LoadFile(@"C:\UsersLockTest\ClassLibrary1\bin\Debug\ClassLibrary1.dll");
        Type calcType = testAssembly.GetType("ClassLibrary1.Class1");
        object calcInstance = Activator.CreateInstance(calcType);

        var x = (bool)calcType.InvokeMember("method1",BindingFlags.InvokeMethod | BindingFlags.Instance | BindingFlags.Public,null, calcInstance, null);
        Console.WriteLine("First project   " + x);
        Console.ReadLine();

and then in Second project I call it as above .

Is there any way to lock method1() for any instances ? I mean First project calls the method1 and then Second Project calls it too.Second Project has to wait till the first one passes the lock .