Automatic creation of derived classes from an associated settings class?

[ahiyaguyoek]

I'm trying to automatically instantiate the correct derived class based on the derived settings class.Here I have the main base class along with a base settings class\[code\]public abstract class BaseClass{ public BaseClass() { } public abstract BaseClassSettings Write();}public class BaseClassSettings{}\[/code\]Now here are my derive classes and their settings classes\[code\]public class DerivedFoo : BaseClass{ public DerivedFoo(DerivedFooSettings settings) { // Apply settings } public override BaseClassSettings Write() { DerivedFooSettings settings = new DerivedFooSettings(); return settings; }}public class DerivedFooSettings : BaseClassSettings{}public class DerivedBar : BaseClass{ public DerivedBar(DerivedBarSettings settings) { // Apply settings } public override BaseClassSettings Write() { DerivedBarSettings settings = new DerivedBarSettings(); return settings; }}public class DerivedBarSettings : BaseClassSettings{}\[/code\]I can save all the derived class settings in one array\[code\]DerivedFoo foo = new DerivedFoo();DerivedBar bar = new DerivedBar();BaseClassSettings[] s = new BaseClassSettings[2];s[0] = foo.Write();s[1] = bar.Write();\[/code\]which serializes to disc in XML format.How can I automatically instantiate the derived classes based on the derived settings classes?So if the array element is a DerivedBarSettings class create a new instance of the DerivedBar class.I would like to do this without using an ever increasing number of else if statements depending on the number of classes. \[code\]if (BaseClassSettings is DerivedFooSettings) new DerivedFoo(settings)else if (BaseClassSettings is DerivedBarSettings) new DerivedBar(settings)\[/code\]How can this be done?===============================================================================[EDIT]Here's what I am using:\[code\][ XmlInclude(typeof(DerivedSettingsClassA)), XmlInclude(typeof(DerivedSettingsClassB)), XmlInclude(typeof(DerivedSettingsClassC)), XmlInclude(typeof(DerivedSettingsClassD)), XmlInclude(typeof(DerivedSettingsClassE)),]public abstract class BaseSettingsClass{ public abstract DerivedClass Load(Game1 game, OutputDimensionSettings settings);}\[/code\]The only downside to this is that I have to explicitely define XmlInclude for all derived classes.