title: Change File Extension Using C#
body: <p>I have many file types: pdf, tiff, jpeg, bmp. etc.
  My question is how can I change file extension?
  I tried this:</p>
  
  <pre><code>my file= c:/my documents/my images/cars/a.jpg;
  string extension = Path.GetExtension(myffile);
  myfile.replace(extension,".Jpeg");
  </code></pre>
  
  <p>No matter what type of file it is, the format I specify must be with the file name. But it does not work. I get file path from browser like <code>c:\..\..\a.jpg</code>, and the file format is <code>a.jpeg</code>. So, when I try to delete it, it gives me an error: <code>Cannot find the file on specified path'</code>. So, I am thinking it has something to do with the file extension that does not match. So, I am trying to convert <code>.jpg</code> to <code>.jpeg</code> and delete the file then.</p>