DarthPedro: Random Thoughts

/// <summary>

/// DescendingComparer is a comparer class the orders items in descending order.

/// </summary>

public sealed class DescendingComparer : IComparer

{

	#region private members

	private CultureInfo culture;

	private static DescendingComparer defaultCurrent = 

		new DescendingComparer(CultureInfo.CurrentCulture);

	private static DescendingComparer defaultInvariant = 

		new DescendingComparer(CultureInfo.InvariantCulture);

	#endregion

 

	#region public properties

	/// <summary>

	/// Gets the default DescendingComparer with its culture set to the CurrentCulture.

	/// </summary>

	public static DescendingComparer Default

	{

		get { return defaultCurrent; }

	}

 

	/// <summary>

	/// Gets the default DescendingComparer with its culture set to the InvariantCulture.

	/// </summary>

	public static DescendingComparer DefaultInvariant

	{

		get { return defaultInvariant; }

	}

	#endregion

 

	/// <summary>

	/// Constructor that sets the CultureInfo for this class.

	/// </summary>

	/// <param name="culture">Culture for this comparer.</param>

	public DescendingComparer(CultureInfo culture)

	{

		this.culture = culture;

	}

 

	/// <summary>

	/// Performs a case-sensitive comparison of two objects of the same type and 

	/// returns a value indicating whether one is less than, equal to or greater 

	/// than the other.

	/// </summary>

	/// <param name="a">First object to compare.</param>

	/// <param name="b">Second object to compare.</param>

	/// <returns>Negative number means a is greater than b; 0 means they're equal; 

	/// Positive number means a is less than b.</returns>

	public int Compare(object a, object b)

	{

		Comparer comparer = (culture == CultureInfo.InvariantCulture) ? 

			Comparer.DefaultInvariant : Comparer.Default;

		return comparer.Compare(a, b) * -1;

	}

}