Multiple search patterns with DirectoryInfo.GetFiles()

DirectoryHelper.cs

namespace Diuturnal.Utility {
  public class DirectoryHelper {
    public static FileInfo[] GetFiles(DirectoryInfo directory,
      params string[] searchPatterns) {

      List<FileInfo> allFiles = new List<FileInfo>();

      foreach (string pattern in searchPatterns) {
        allFiles.AddRange(directory.GetFiles(pattern));
      }

      allFiles.Sort(delegate(FileInfo x, FileInfo y)
        { return x.Name.CompareTo(y.Name); });

      return allFiles.ToArray();
    }
  }
}