Check out the Syntax Highlighter plugin for Windows Live Writer.

///<summary>
///A test for CreateGallery (string)
///</summary>
[TestMethod(), ExpectedException(typeof(ArgumentNullException))]
public void CreateGallery_TestNull()
{
    GalleryHelper target = new GalleryHelper();

    string imageDirectory = null;

    target.CreateGallery(imageDirectory);
}

Works just like you'd expect! If it had a few more niceties like taking out leading spaces, it'd be even better!