从超类获取字段

我有以下抽象类:

 abstract class Customer
{
    private string address { get; set; }
    private int phone { get; set; }
    public Customer(string address, int phone)
    {
        this.address = address;
        this.phone = phone;
    }
}

然后我有以下类继承自客户类:

   class Private : Customer
{
    private string name { get; set; }
    private int age { get; set; }
    private string sex { get; set; }
    public Private(string name, int age, string sex, string address, int phone) : base(address, phone)
    {
        this.name = name;
        this.age = age;
        this.sex = sex;
    }

我的问题是:我如何访问我的私人类的电话和地址字段?