C# inheritance build errors

I am new to Stack Overflow and a neophyte programmer. I am trying to build in Visual Studio 2010 C# someone else’s code as a learning opportunity. I am unable to figure out why I get the following three errors in the four classes (line 50, 59, 67, & 75) at the bottom of the attached stub code (I stripped out from the original program everything not germane to the errors):

1.  “c_basic_object”   Method must have a return type
2.  “:”  ; expected
3.  “(p_name)” Invalid token ')' in class, struct, or interface member declaration
4.  “p_name”  The type or namespace name 'p_name' could not be found (are you missing a using directive or an assembly reference?)

The code is almost identical to the Employee and Manager classes in Andrew Troelsen’s Pro C# 2005 book in Chapter 4.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace TestStub
{
class Program
{
    static void Main(string[] args)
    {
        String strTest1 = "This is a string #1";
        String strTest2 = "This is a string #2";

        c_basic_object objBasic = new c_basic_object(strTest1);
        Console.WriteLine(objBasic.m_name);

        c_abstract_button_widget objButton = new c_abstract_button_widget();

        Console.WriteLine("Test, Test, Test");
        Console.ReadKey(true);
        Console.WriteLine();
    }
}// End class Program

public class c_basic_object
{
    public string m_name = String.Empty;
    //Constructor  create_basic_object( p_name)
    public c_basic_object(string p_name)
    {
        m_name = p_name;
    }
    // create_basic_object
    //Constructor  construct_empty()
    public c_basic_object()
    {
    }
    // construct_empty
    //@ Destructor  Destroy()
    ~c_basic_object()
    {
    }
} // End class c_basic_object


// -- definitions only for the Virtual Abstract functions in the factory
public class c_abstract_button_widget: c_basic_object
{
    public c_basic_object(string p_name) : base(p_name)
    {
        //Console.WriteLine("Inside c_abstract_button_widget ");
    }
} // end c_abstract_button_widget

// c_abstract_button_widget
public class c_abstract_label_widget: c_basic_object
{
    public c_basic_object(string p_name) : base(p_name)
    {
    }
} // end c_abstract_label_widget

// c_abstract_label_widget
public class c_abstract_draw_surface_widget: c_basic_object
{
    public c_basic_object(string p_name) : base(p_name)
    {
    }
} // end c_abstract_draw_surface_widget

// c_abstract_draw_surface_widget
public class c_abstract_scrollbar_widget: c_basic_object
{
    public c_basic_object(string p_name) : base(p_name)
    {
    }
} // end c_abstract_scrollbar_widget
}// End namespace TestStub