title: Programmatically set enum Description Attribute value
body: <p>I've got a enum decorated with a description to get a readable description:</p>
  
  <pre><code>public enum MyEnum
  {
    [Description("First Class")]
    FirstClass = 0,
    [Description("Second Class")]
    SecondClass = 1,
  }
  </code></pre>
  
  <p>For some customers it would be helpful to show a different description -  Is there a way to change the description value during runtime? Like</p>
  
  <pre><code>MyEnum.SecondClass.Description = "New Class";
  </code></pre>