title: bug in NHunspell spelling checker
body: <p>I am using NHunspell for checking spelling.I added NHunspell.dll as a reference to my asp.net page.I added the namespace System.NHunspell.
  The problem i am facing is related to IDisposible.
  I put the downloaded code of NHunspell inside the button event.</p>
  
  <p>protected void Button1_Click(object sender, EventArgs e)
          {</p>
  
  <pre><code>        using (Hunspell hunspell = new Hunspell("en_us.aff", "en_us.dic"))
          {
              bool correct = hunspell.Spell("Recommendation");
              var suggestions = hunspell.Suggest("Recommendatio");
              foreach (string suggestion in suggestions)
              {
                  Console.WriteLine("Suggestion is: " + suggestion);
              }
          }
  
          // Hyphen
          using (Hyphen hyphen = new Hyphen("hyph_en_us.dic"))
          {
              var hyphenated = hyphen.Hyphenate("Recommendation");
          }
  
  
  *  using (MyThes thes = new MyThes("th_en_us_new.idx", "th_en_us_new.dat"))
          {
              using (Hunspell hunspell = new Hunspell("en_us.aff", "en_us.dic"))
              {
                  ThesResult tr = thes.Lookup("cars", hunspell);
                  foreach (ThesMeaning meaning in tr.Meanings)
                  {
                      Console.WriteLine("  Meaning: " + meaning.Description);
                      foreach (string synonym in meaning.Synonyms)
                      {
                          Console.WriteLine("    Synonym: " + synonym);
  
                      }
                  }
              }
  
  
          }
  </code></pre>
  
  <p>The * shown above is the line of error.The error is:
  " type used in a using statement must be implicitly convertible to 'System.IDisposable'".</p>
  
  <p>Also there is a warning on that line :"'NHunspell.MyThes.MyThes(string, string)' is obsolete: 'idx File is not longer needed, MyThes works completely in memory'";  </p>
  
  <p>Can any one help me to correct this???  </p>
  
  <p>ok, I changed that line to MyThes thes = new MyThes("th_en_us_new.dat"); bug is gone.</p>
  
  <p>But there is an exception "AFF File not found: E:\programfiles\visual studio\Common7\IDE\en_us.aff". what i should do??</p>