Multiple search patterns with DirectoryInfo.GetFiles()

Another visit to Google today showed various requests about how to specify more than one pattern to search for when grabbing the files from a directory, so for example, get all the .mp3 and .wma files in one call.

As far as I can see, you can only specify one pattern at a time (unless there's something new in 2.0 that I've missed) so I thought this was a good candidate for a simple wrapper. The code below should be fairly easy to modify if you have any specific requirements in your situation.

	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();
	}
	}
	}

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