Use ReadOnlyCollection to wrap a collection : ReadOnlyCollection « Collections Data Structure « C# / C Sharp

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C# / C Sharp » Collections Data Structure » ReadOnlyCollectionScreenshots 
Use ReadOnlyCollection to wrap a collection
 

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);
        }
    }
}

class Program {
    public static void Main(){
        List<Customer> collCustList = new List<Customer>();
        collCustList.Add(new Customer(99"H""P"));
        collCustList.Add(new Customer(77"B""G"));
        collCustList.Add(new Customer(55"B""G"));
        collCustList.Add(new Customer(88"B""P"));
        collCustList.Add(new Customer(11"L""O"));

        ReadOnlyCollection<Customer> roCustColl = new ReadOnlyCollection<Customer>(collCustList);

        Customer tmpCust = roCustColl[1];
        tmpCust.Name = "NAME CHANGED";

        foreach (Customer cust in roCustColl)
            Console.Out.WriteLine(cust);
    }
}

 
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