In .NET there is a String.IsNullOrEmpty, but there is no similar thing on an Array. There should be, and there is a solution is in the new extension methods. This one works for all collections.

using System.Collections;

namespace MyExtensions
{
  public static class CollectionExtensions
  {
    public static bool IsNullOrEmpty(this ICollection col)
    {
      return (col == null || col.Count == 0);
    }
  }
}