title: C# metro No mapping for the Unicode character exists in the target multi-byte code page
body: <p>Line:</p>
  
  <p><code>IList&lt;string&gt; text = await FileIO.ReadLinesAsync(file);</code></p>
  
  <p>causes exception <code>No mapping for the Unicode character exists in the target multi-byte code page</code></p>
  
  <p>When I remove chars like <code>ąśźćóż</code> from my file it runs ok, but the problem is that I can't guarantee that those chars won't happen in future.</p>
  
  <p>I tried changing the encoding in advanced save options but it is already </p>
  
  <p><code>Unicode (UTF-8 with signature) - Codepage 65001</code></p>
  
  <p>I have a hard time trying to figure this one out.</p>