Why is Convert.ToDouble(char) not supported?
<p>From the msdn page :</p>

<blockquote>
  <p><code>public static double ToDouble(
    char value
  )</code></p>
  
  <p><strong>Parameters</strong></p>
  
  <p><em>value</em><br>
  Type: System.Char
  The Unicode character to convert. </p>
  
  <p><em>Return Value</em><br>
  Type: System.Double
  This conversion is not supported. No value is returned.</p>
</blockquote>

<p>If it is not supported, why is it implemented in the first place ?</p>
