class TempRecord
{
    // Array of temperature values
    private float[] temps = new float[10] { 56.2F, 56.7F, 56.5F, 56.9F, 58.8F, 
                                            61.3F, 65.9F, 62.1F, 59.2F, 57.5F };
    // Auto-Implemented Property
    System.DateTime date { get; set; } 
    // To enable client code to validate input 
    // when accessing your indexer.
    public int Length
    {
        get { return temps.Length; }
    }
    // Indexer declaration.
    // Input parameter is validated by client 
    // code before being passed to the indexer.
    public float this[int index]
    {
        get
        {
            return temps[index];
        }

        set
        {
            temps[index] = value;
        }
    }
}

class MainClass
{
    static void Main()
    {
        TempRecord tempRecord = new TempRecord();
        // Use the indexer's set accessor
        tempRecord[3] = 58.3F;
        tempRecord[5] = 60.1F;

        // Use the indexer's get accessor
        for (int i = 0; i < 10; i++)
        {
            // This example validates the input on the client side. You may
            // choose to validate it in the class that implements the indexer, and throw an
            // exception or return an error code in the case of invalid input.
            if (i < tempRecord.Length)
            {
                System.Console.WriteLine("Element #{0} = {1}", i, tempRecord[i]);
            }
            else
            {
                System.Console.WriteLine("Index value of {0} is out of range", i);
            }
        }

        //Uncomment this code to see how the .NET Framework handles indexer exceptions
        //try
        //{
        //    System.Console.WriteLine("Element #{0} = {1}", tempRecord[tempRecord.Length]);
        //}
        //catch (System.ArgumentOutOfRangeException e)
        //{
        //    System.Console.WriteLine(e);
        //}
    }
}

// Using a string as an indexer value
class DayCollection
{
    string[] days = { "Sun", "Mon", "Tues", "Wed", "Thurs", "Fri", "Sat" };

    // This method finds the day or returns -1
    private int GetDay(string testDay)
    {
        int i = 0;
        foreach (string day in days)
        {
            if (day == testDay)
            {
                return i;
            }
            i++;
        }
        return -1;
    }

    // The get accessor returns an integer for a given string
    public int this[string day]
    {
        get
        {
            return (GetDay(day));
        }
    }
}

class Program
{
    static void Main(string[] args)
    {
        DayCollection week = new DayCollection();
        System.Console.WriteLine(week["Fri"]);
        System.Console.WriteLine(week["Made-up Day"]);
    }
}