Programmatically set enum Description Attribute value

I've got a enum decorated with a description to get a readable description:

public enum MyEnum
{
  [Description("First Class")]
  FirstClass = 0,
  [Description("Second Class")]
  SecondClass = 1,
}

For some customers it would be helpful to show a different description - Is there a way to change the description value during runtime? Like

MyEnum.SecondClass.Description = "New Class";