<p>I am trying to set the innerxml of a xmldoc but get the exception: Reference to undeclared entity</p>

<pre><code>XmlDocument xmldoc = new XmlDocument();
string text = "Hello, I am text &amp;alpha; &amp;nbsp; &amp;ndash; &amp;mdash;"
xmldoc.InnerXml = "&lt;p&gt;" + text + "&lt;/p&gt;";
</code></pre>

<p>This throws the exception: </p>

<blockquote>
  <p>Reference to undeclared entity 'alpha'. Line 2, position 2.. </p>
</blockquote>

<p>How would I go about solving this problem?</p>

Try replacing &Alpha with
```
```
&#913;
```
```