title: if exist check with case sensitive in batch
body: <p>I need to check whether the given file is exist or not with case sensitive, out.txt(all are small letters) file is present in location where i running the script.</p>
  
  <p>Code: </p>
  
  <pre><code>Case1:
  filename=out.txt
   if exist %filename% (
      echo file exist...
  ) else echo File doesn't exist...
  
  Case2:
  filename=OUT.TXT
  if exist %filename% (
      echo file exist...
  ) else echo File doesn't exist...
  </code></pre>
  
  <p>For both case it showing file exist... output. But i need to check with case sensitive. It should show "File doesn't exist" msg for OUT.TXT</p>
  
  <p>Thanks in advance</p>