title: Convert float to string with comma and dot
body: <p>I have a nullable float. The internal decimal places can be separated with dot or comma e.g. 1.2 or 1,2. I need this float as a string to compare it to a Regex. If I use the Convert.toString method, the float with the comma is 12 and not 1.2. How can I convert a float to String without loosing the comma or the dot? I alredy tried to convert it with diffrent cultures.</p>
  
  <p>Thanks for your help</p>