title: How to Check If File is Encrypted using AES (Rijndael)
body: <p>I am using 'RijndaelManaged' and 'CryptoStream' classes in C# to encrypt files. Before encrypting the files, i want to check whether the file is already encrypted or not. </p>
  
  <p>I tried using <code>File.GetAttributes()</code> method to check for Encryption but it is not working.</p>
  
  <p>I need some tips on ways i can check whether the file is already Encrypted or not.</p>