title: example sample of lexical analyzer in c#
body: <p>i want to use some built in lexical analyzer and parser, i need some examples or samples demonstaring the use.</p>
  
  <p>any one has use any lexical analyzer in C#???</p>
  
  <p>can any one share the sample and code how to use that.</p>
  
  <p>i didnt find many ANTLR and lex 
  but i cant find any examples or tutorial.</p>
  
  <p>please let me know if any one has used any such thing.</p>