.NET Clones a collection into an array of the specified type.

IEnumerableExtensions.cs

namespace Extensions
{
    /// <summary>
    /// Extension methods for classes that implement the <see cref="IEnumerable"/> interface.
    /// </summary>
    public static class IEnumerableExtensions
    {
        /// <summary>
        /// Converts the collection to an array that is a deep copy of the source list.
        /// </summary>
        /// <typeparam name="TU">The type of the U.</typeparam>
        /// <param name="source">The source.</param>
        /// <returns>An array of the specified type.</returns>
        public static TU[] ToClonedArray<TU>(this IEnumerable<TU> source) where TU : ICloneable
        {
            int ct = source.Count();
            IList<TU> sourceList = source.ToList();

            TU[] final = new TU[ct];
            for (int i = 0; i < ct; i++)
            {
                final[i] = (TU)sourceList[i].Clone();
            }

            return final;
        }
    }
}