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.