title: Replacement for CharInSet function in Delphi Prism
body: <p>Is there a similar function as CharInSet in Delphi Prism? If not, how would you do it?</p>
  
  <p>I looked online and on StackOverflow, but they speak in terms of Delphi not Delphi Prism for .NET.</p>
  
  <p>I also found out that the include method for setting an element to a set is not available either.</p>
  
  <p>what are the replacements, if any, for these method?</p>