Design and Architecture

// ---- 1st implementation - virtual class hierarchy
// implementation 1

class TargetBase
{
  abstract object Convert(object o);
};

public class TypeAdapter
{
  Dictionary<object, TargetBase> dict;

  public void Add(Type source, Type target)       { dict.Add(source, new TypeTarget(target); }
  public void Add(Type source, MyDelegate target) { dict.Add(source, new DelegateTarget(target); }

  object Map(object o) { return dict[o.GetType()].Convert(o); }
};

// ---- 2nd implementation - using the delegates directly
// implementation 1
public class TypeAdapter
{
  Dictionary<object, MyDelegate> dict;

  public void Add(Type source, MyDelegate target) { dict.Add(source, new DelegateTarget(target); }
  public void Add(Type source, Type target)       
  { 
    dict.Add(source, delegate(object o) { Activator.CreateInstance(target, o); } 
  }

  object Map(object o) { return dict[o.GetType()](o); }
};