public override string?Render()
{
Content = ChildNode?.Render();
Content = Content != null ? $"<h3{GetAttributes()}>{Content}</h3>" : $"<h3{GetAttributes()}></h3>";
return(Content + SiblingNode?.Render());
}
public override string?Render()
{
if (!IsChildAllowed(ChildNode?.GetType()))
{
throw new InvalidOperationException($"Child of type {ChildNode?.GetType()} is not allowed");
}
if (!IsSiblingAllowed(SiblingNode?.GetType()))
{
throw new InvalidOperationException($"Sibling of type {SiblingNode?.GetType()} is not allowed");
}
Content = ChildNode?.Render();
Content = Content != null ? $"<head>{Content}</head>" : "<head></head>";
return(Content + SiblingNode?.Render());
}