public static class Files : 
  Attributes:
  Methods:
    + WriteLines (string filename, IEnumerable<string> lines) static
    + ReadLines (string filename) : IEnumerable<string> static
    + SearchFiles (IEnumerable<string> directories, IEnumerable<string> extensions, Action<string> add) static
    + SearchFiles (string directory, IEnumerable<string> extensions, Action<string> add) static
    + ToCharacters (this IEnumerable<string> lines) : IEnumerable<char> static
