Best way to create instance of child object from parent object

Question

I'm creating a child object from a parent object. So the scenario is that I have an object and a child object which adds a distance property for scenarios where I want to search. I've chosen to use inheritance as my UI works equivalently with either a search object or a list of objects not the result of a location search. So in this case inheritance seems a sensible choice.

As present I need to generate a new object MyObjectSearch from an instance of MyObject. At present I'm doing this in the constructor manually by setting properties one by one. I could use reflection but this would be slow. Is there a better way of achieving this kind of object enhancement?

Hopefully my code below illustrates the scenario.

public class MyObject {      // Some properties and a location. }  public class MyObjectSearch : MyObject {      public double Distance { get; set; }          public MyObjectSearch(MyObject obj) {          base.Prop1 = obj.Prop1;          base.Prop2 = obj.Prop2;     } } 

And my search function:

public List<MyObjectSearch> DoSearch(Location loc) {    var myObjectSearchList = new List<MyObjectSearch>();            foreach (var object in myObjectList) {        var distance = getDistance();        var myObjectSearch = new MyObjectSearch(object);        myObjectSearch.Distance = distance;        myObjectSearchList.add(myObjectSearch);    }     return myObjectSearchList; } 

Answer 1

The base class needs to define a copy constructor:

public class MyObject {     protected MyObject(MyObject other)     {         this.Prop1=other.Prop1;         this.Prop2=other.Prop2;     }      public object Prop1 { get; set; }     public object Prop2 { get; set; } }  public class MyObjectSearch : MyObject {      public double Distance { get; set; }      public MyObjectSearch(MyObject obj)          : base(obj)     {         this.Distance=0;     }     public MyObjectSearch(MyObjectSearch other)          : base(other)     {         this.Distance=other.Distance;     } } 

This way the setting of properties is handled for all derived classes by the base class.