Shuffle An Array in C#

Shuffle.cs

/// <summary>
/// Shuffle an <seealso cref="Array"/> of type <typeparamref name="T"/>
/// then return it for chaining.
/// </summary>
/// <typeparam name="T">Type of element in array.</typeparam>
/// <param name="array">The array which need to shuffle. This array will be modified.</param>
/// <returns>The modified array. It's the same reference with the input array.</returns>
public T[] Shuffle<T>(T[] array)
{
  Random rnd = new Random();
  for (int i = 0; i < array.Length; ++i)
  {
    int idx = rnd.Next(array.Length);
    T tmp = array[i];
    array[i] = array[idx];
    array[idx] = tmp;
  }
  return array;
}