title: Generate a 128-bit string in C#
body: <p>I am developing a class project in C# that encrypts the users and admins passwords. To encrypt I'm using the <code>TripleDESCryptoServiceProvider</code>. </p>
  
  <p>In the configuration app the user enters the key to be used for encryption and decryption of the passwords. I want to have a button to generate a key to help the user but I'm at a loss as to how I generate the 128 bits randomly. How a generate a key with 128-bits?</p>