Copies an array with rank 1 and any lower-bound into a single-dimensional zero-based array (SZ-array) with lower bound zero.

ToSZArray.cs

using System;

namespace Virtlink
{
    /// <summary>
    /// Helper methods for arrays.
    /// </summary>
    /// <example>
    /// Usage example:
    /// <code>
    /// // Creating an array string[2..11].
    /// Array customArray = Array.CreateInstance(typeof(string), new int[] { 10 }, new int[] { 2 });
    /// 
    /// // Turn it into a normal array string[10].
    /// string[] normalArray = ArrayHelper.ToSZArray&lt;string&gt;(customArray);
    /// </code>
    /// </example>
    /// <remarks>
    /// Created by Virtlink. Original source code on GitHub:
    /// <see href="https://gist.github.com/Virtlink/7457611"/>.
    /// </remarks>
    public static class ArrayHelper
    {
        /// <summary>
        /// Copies an array with rank 1 and any lower-bound
        /// into a single-dimensional zero-based array (SZ-array) with lower bound zero.
        /// </summary>
        /// <typeparam name="T">The type of elements.</typeparam>
        /// <param name="array">The array to copy from.</param>
        /// <returns>The resulting SZ-array.</returns>
        public static T[] ToSZArray<T>(Array array)
        {
            #region Contract
            if (array == null)
                throw new ArgumentNullException("array");
            if (array.Rank != 1)
                throw new ArgumentException("Expected array with rank 1.", "array");
            #endregion

            T[] dest = new T[array.Length];
            Array.Copy(array, dest, array.Length);
            return dest;
        }
    }
}