title: What word or phrase means the opposite of "white space"?
body: <p>I'm currently writing some C# extension methods dealing with string parsing, and I like to be terse yet descriptive and accurate in my method names.</p>
  
  <p>Question: Is there a good word or phrase that describes the opposite of white space?</p>
  
  <p>To be clear, this set of characters are visible and would consume ink if printed on paper.  But I don't care to use terms related to ink, paper, or printing, nor do I want to assume any particular colors.</p>
  
  <p>VisibleCharacters seems the most technically accurate but a bit long.</p>
  
  <p>NonWhiteSpace seems like a double negative to me. I'd rather deal in what something IS, rather than what it IS NOT.</p>
  
  <p>Thanks.</p>