title: Why the HtmlEncode doesn't encode this char?
body: <p>This is the code :</p>
  
  <pre><code>Response.Write("asd1 X : " + HttpUtility.HtmlEncode("×"));
  Response.Write("asd2 X : " + HttpUtility.HtmlEncode("✖"));
  </code></pre>
  
  <p>The fist one is :</p>
  
  <pre><code>asd1 X : &amp;#215; // OK, ENCODED AS HTML ENTITIES
  </code></pre>
  
  <p>the second no, just ✖ :</p>
  
  <pre><code>asd2 X : ✖
  </code></pre>
  
  <p>which kind of char is that? Also, if I try <a href="http://htmlentities.net/" rel="nofollow">here</a> the result is :</p>
  
  <pre><code>asd1 X : &amp;times;
  asd2 X : &amp;amp;#10006;
  </code></pre>
  
  <p>What?? Why this differences?</p>