inheritance - cast the Parent object to Child object in C#

Question

Hi i want to cast the Parent object to Child object in C#

public class Parent
{
    public string FirstName {get; set;}
    public string LastName {get; set;}
    public string City {get; set;}
}

public class Child : Parent
{
    public string PhoneNumber {get; set;}
    public string MobileNumber {get; set;}
}

now the scenario is is a list of parent object and i want to generate list of child object so that i can have extended information

List<Parent> lstParent;
List<Child> lstChild = new List<Child>();

foreach(var obj in lstParent)
{
    lstChild.add((Child)obj);
}

as child class inherited parent class so the child class already have the parent class member i just want to fill them automatically so that i can populate datamember of child class

Answer 1

I do so (this is just an example):

using System.Reflection;

public class DefaultObject
{
    ...
}

public class ExtendedObject : DefaultObject
{
    ....
    public DefaultObject Parent { get; set; }

    public ExtendedObject() {}
    public ExtendedObject(DefaultObject parent)
    {
        Parent = parent;

        foreach (PropertyInfo prop in parent.GetType().GetProperties())
            GetType().GetProperty(prop.Name).SetValue(this, prop.GetValue(parent, null), null);
    }
}

Using:

DefaultObject default = new DefaultObject { /* propery initialization */ };
ExtendedObject extended = new ExtendedObject(default); // now all properties of extended are initialized by values of default properties.
MessageBox.Show(extended.Parent.ToString()); // now you can get reference to parent object