Csharp/C Sharp/Collections Data Structure/SortedDictionary

Use SortedDictionary to store class implementing System.IComparable

 
using System;
using System.Collections.ObjectModel;
using System.Collections.Generic;
using System.Text;
using System.Runtime.Serialization;

public class Customer : System.IComparable {
    private int _id;
    private string _name;
    private string _rating;
    private static SortOrder _order;
    public enum SortOrder {
        Ascending = 0,
        Descending = 1
    }
    public Customer(int id, string name)
        : this(id, name, "Other") {
    }
    public Customer(int id, string name, string rating) {
        this._id = id;
        this._name = name;
        this._rating = rating;
    }
    public int Id {
        get { return this._id; }
        set { this._id = value; }
    }
    public string Name {
        get { return this._name; }
        set { this._name = value; }
    }
    public string Rating {
        get { return this._rating; }
        set { this._rating = value; }
    }
    public static SortOrder Order {
        get { return _order; }
        set { _order = value; }
    }
    public override bool Equals(Object obj) {
        bool retVal = false;
        if (obj != null) {
            Customer custObj = (Customer)obj;
            if ((custObj.Id == this.Id) &&
                (custObj.Name.Equals(this.Name) &&
                (custObj.Rating.Equals(this.Rating))))
                retVal = true;
        }
        return retVal;
    }
    public override string ToString() {
        return this._id + ": " + this._name;
    }
    public int CompareTo(Object obj) {
        switch (_order) {
            case SortOrder.Ascending:
                return this.Name.rupareTo(((Customer)obj).Name);
            case SortOrder.Descending:
                return (((Customer)obj).Name).rupareTo(this.Name);
            default:
                return this.Name.rupareTo(((Customer)obj).Name);
        }
    }
}
class Program {
    public static void Main(){
        Dictionary<int, Customer> custDict = new Dictionary<int, Customer>();
        custDict[99] = new Customer(99, "H", "P");
        custDict[77] = new Customer(77, "B", "G");
        custDict[55] = new Customer(55, "B", "S");
        custDict[88] = new Customer(88, "B", "P");
        Dictionary<int, Customer>.ValueCollection unsortedValues;
        unsortedValues = custDict.Values;
        foreach (Customer cust in unsortedValues)
            Console.Out.WriteLine("Customer Name: {0}", cust.Name);
        SortedDictionary<int, Customer> sortedDict;
        sortedDict = new SortedDictionary<int, Customer>(custDict);
        SortedDictionary<int, Customer>.ValueCollection sortedValues;
        sortedValues = sortedDict.Values;
        foreach (Customer cust in sortedValues) {
            Console.Out.WriteLine("Customer->{0}", cust.Name);
        }
        sortedDict.Remove(88);
        sortedValues = sortedDict.Values;
        foreach (Customer cust in sortedValues) {
            Console.Out.WriteLine("Customer->{0}", cust.Name);
        }
    }
}