/// <summary>
/// Returning boolean whether the <see cref="EventDefinition"/> is assignable on the given <see cref="FrameworkElement"/>.
/// </summary>
/// <param name="element"><see cref="FrameworkElement"/> to check the assign ability for.</param>
/// <returns></returns>
internal bool IsAssignable(FrameworkElement element)
{
var t = element.GetType();
var desc = EventType.GetAttribute <EventDescription>();
return(desc.DeclaringTypes.Any(type => type.IsAssignableFrom(t) || type.Equals(t)));
}
