Exception TheArtOfDev.HtmlRenderer.Core.HtmlContainerInt.set_PageSize

[ghost]

When I execute:

PdfDocument pdf = PdfGenerator.GeneratePdf("<p><h1>Hello World</h1>This is html rendered text</p>", PageSize.A4);

happens this exeception:

Method not found: 'Void TheArtOfDev.HtmlRenderer.Core.HtmlContainerInt.set_PageSize(TheArtOfDev.HtmlRenderer.Adapters.Entities.RSize)'.

My HtmlRenderer.PdfSharp version: 1.5.1-beta1

Because I need do a page break with :

td { page-break-inside: avoid; }

My PdfSharp version: 1.50.5147