A set of Tuple classes for pre-.NET 4.0

Tuple.cs

namespace Foundation
{
    /// <summary>
    /// Static extensions for creating tuples.
    /// </summary>
    public static class Tuple
    {
        #region methods

        /// <summary>
        /// Creates a tuple from the provided <paramref name="first"/> and <paramref name="second"/> values.
        /// </summary>
        /// <typeparam name="T1">The type of the first value.</typeparam>
        /// <typeparam name="T2">The type of the second value.</typeparam>
        /// <param name="first">The first.</param>
        /// <param name="second">The second.</param>
        /// <returns>The tuple.</returns>
        public static Tuple<T1, T2> Create<T1, T2>(T1 first, T2 second)
        {
            return new Tuple<T1, T2>(first, second);
        }

        /// <summary>
        /// Creates a tuple from the provided <paramref name="first"/> and <paramref name="second"/> values.
        /// </summary>
        /// <typeparam name="T1">The type of the first value.</typeparam>
        /// <typeparam name="T2">The type of the second value.</typeparam>
        /// <typeparam name="T3">The type of the third value.</typeparam>
        /// <param name="first">The first value.</param>
        /// <param name="second">The second value.</param>
        /// <param name="third">The third value.</param>
        /// <returns>The tuple.</returns>
        public static Tuple<T1, T2, T3> Create<T1, T2, T3>(T1 first, T2 second, T3 third)
        {
            return new Tuple<T1, T2, T3>(first, second, third);
        }

        #endregion
    }

    /// <summary>
    /// A tuple of two values.
    /// </summary>
    /// <typeparam name="T1">The type of the first value.</typeparam>
    /// <typeparam name="T2">The type of the second value.</typeparam>
    public class Tuple<T1, T2>
    {
        #region fields

        /// <summary>
        /// The first value.
        /// </summary>
        public readonly T1 First;

        /// <summary>
        /// The second value.
        /// </summary>
        public readonly T2 Second;

        #endregion

        #region constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="Tuple&lt;T1, T2&gt;"/> class.
        /// </summary>
        /// <param name="first">The first.</param>
        /// <param name="second">The second.</param>
        public Tuple(T1 first, T2 second)
        {
            First = first;
            Second = second;
        }

        #endregion
    }

    /// <summary>
    /// A tuple of three values.
    /// </summary>
    /// <typeparam name="T1">The type of the first value.</typeparam>
    /// <typeparam name="T2">The type of the second value.</typeparam>
    /// <typeparam name="T3">The type of the third value.</typeparam>
    public class Tuple<T1, T2, T3>
    {
        #region fields

        /// <summary>
        /// The first value.
        /// </summary>
        public readonly T1 First;

        /// <summary>
        /// The second value.
        /// </summary>
        public readonly T2 Second;

        /// <summary>
        /// The third value.
        /// </summary>
        public readonly T3 Third;

        #endregion

        #region constructors

        /// <summary>
        /// Initializes a new instance of the <see cref="Tuple&lt;T1, T2, T3&gt;"/> class.
        /// </summary>
        /// <param name="first">The first.</param>
        /// <param name="second">The second.</param>
        /// <param name="third">The third.</param>
        public Tuple(T1 first, T2 second, T3 third)
        {
            First = first;
            Second = second;
            Third = third;
        }

        #endregion
    }
}