title: Renaming files in folder c#
body: <p>I have over 1000 files in a folder with names like abc_1, abc_2 ... abc_n</p>
  
  <p>I want to delete this prefix 'abc_' from all the files. Any chance to not doing this manually because there are over 1000, and it will be a pain.</p>
  
  <p>How can do this with c# ?</p>