Problems with a method imported from a SDK library
<p>I am new to C# and ASP.NET and I have a problem with a library that I am importing. I have a small application that is going to convert a sound file in a format that is proprietaty to the vendor and they have an SDK that provides a method to make the conversion from their extension to .WAV format.</p>

<p>The issue I have is after importing the SDK library into VS2008, and putting the using statement on my code behind, I am getting an error when I try to use the method I need in order to make the conversion. My code is below and the error says:</p>

<blockquote>
  <p>Name space ALTIHELPERLib</p>
  
  <p>Error 'ALTIHELPERLib.IAHelper.ADPCM2Wav(wavFilePath, filePath)'. Not all code paths return a value return </p>
</blockquote>

<p>I have tried to look around for a solution but so far nothing has worked. Any help will be appreciate it. Here is my code:</p>

<pre><code>string wavFilePath = @"\mylocation\"; //destination of file once onverted
string filePath = "\source\"; //location of source file

public string ALTIHELPERLib.IAHelper.ADPCM2Wav(wavFilePath, filePath){

}
</code></pre>
