c# Compilation Error
<p>I'm doing image steganography and visual cryptography project using RSA algorithm. While compiling the project I'm getting these errors:</p>

<blockquote>
  <p>ArgumentException was unhandled</p>
</blockquote>

<p>and also </p>

<blockquote>
  <p>Empty path name is not legal</p>
</blockquote>

<p>This error shown in:</p>

<pre><code>FileStream outStream = 
    new FileStream(stegoFileName, FileMode.Create, FileAccess.Write);
</code></pre>
