How to hide an inherited property in a class without modifying the inherited class (base class)?

Question

If i have the following code example:

public class ClassBase
{
    public int ID { get; set; }

    public string Name { get; set; }
}

public class ClassA :         


        

Answer 1

Why force inheritance when it's not necessary? I think the proper way of doing it is by doing has-a instead of a is-a.

public class ClassBase
{
    public int ID { get; set; }

    public string Name { get; set; }
}

public class ClassA
{
    private ClassBase _base;

    public int ID { get { return this._base.ID; } }

    public string JustNumber { get; set; }

    public ClassA()
    {
        this._base = new ClassBase();
        this._base.ID = 0;
        this._base.Name = string.Empty;
        this.JustNumber = string.Empty;
    }
}