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.CompareTo(((Customer)obj).Name); case SortOrder.Descending: return (((Customer)obj).Name).CompareTo(this.Name); default: return this.Name.CompareTo(((Customer)obj).Name); } } } public class CollectionTest { public static void Main() { Collection<Customer> custColl = new Collection<Customer>(); custColl.Add(new Customer(1, "S")); custColl.Add(new Customer(2, "K")); custColl.Add(new Customer(3, "T")); custColl.Insert(1, new Customer(4, "Inserted Employee")); custColl[3] = new Customer(9, "F"); foreach (Customer cust in custColl) Console.Out.WriteLine(cust); } }