Inherited class constructors

Considering the following class:

        class EngineObject
        {
            #region EngineObject Properties
            // ...
            #endregion

            #region EngineObject Constructors
       
                public EngineObject()
                {
                    this.Name = System.Guid.NewGuid().ToString();
                }

                public EngineObject(string InitName)
                {
                    this.Name = InitName;
                }

            #endregion

            #region EngineObject Public Functions
            // ...
            #endregion
        }

the theory is that, if a string argument is given when an object is created, that string argument is stored in the Name property.  if no argument is given, a unique string is generated (to prevent failure of subsequent methods).  If I now derive a class from that:

        class Class1 : EngineObject
        {
        }

and create the following from my main routine:

        EngineObject obj1 = new EngineObject()
        EngineObject obj2 = new EngineObject("test2")
        Class1 obj3 = new Class1()
        Class1 obj4 = new Class1("test4")

        Console.WriteLine("{0}", obj1.Name)
        Console.WriteLine("{0}", obj2.Name)
        Console.WriteLine("{0}", obj3.Name)
        Console.WriteLine("{0}", obj4.Name)

I am told that no overload is present in Class1 that accepts a string.  I have tried using

        public extern Class1(string InString);

but that did not work.  If i comment out the declaration of obj4 and the relevant Console output line, I can see the following:

        12345-67890-abcdef (etc)
        test2
        fedcba-09876-54321 (etc)

So it seems that Class1 inherits EngineObject() but not EngineObject(string InName).  How do I specify that I want to use the code in my base constructors as the inherited ones?

J.