C#

public class GlobalList
    {
        public static List<GlobalList> listItems = new List<GlobalList>();

        private string _someImportantData;
        public GlobalList(string data)
        {
            _someImportantData = data;
            //do more stuff
            listItems.Add(this);
        }
    }

    public abstract class PlugInBase
    {
        //All "plug-ins" will be derived from this class
        public static void Initalize() { } //I'm trying to do this to force the
//creation of MyClassGlobalList, below, but it doesn't work
    }

    public class MyClass : PlugInBase
    {
        public static GlobalList MyClassGlobalList = new GlobalList("MyClass data");

        public MyClass()
        {
            //do stuff
        }
    }

    static class ExeClass
    {
        static void Main()
        {
            MyClass.Initalize(); //this is a search of all .dll files in the "plug-in" folder,
//then run .Initalize() on all classes of type "PlugInBase"
            
            GlobalList.listItems.Exists(...) //nothing in list =(
        }
    }

this.SetStyle(ControlStyles.UserPaint, true);

e.Graphics.TextRenderingHint = TextRenderingHint.ClearTypeGridFit;

abstract class CBase
{
    public override abstract string ToString();
}

class CDeriv1 : CBase
{
    public override string ToString()
    {
        return "Deriv1";
    }
}

class Program
{
    static void Main(string[] args)
    {
        CBase nod = new Deriv1();
    }
}

Keith Barrow wrote:

It is already declared as virtual in object,

CDeriv1 foo = new CDeriv1();
CBase myInstance = foo;