AngleSharp by Florian Rappl

CssWidowsProperty

sealed class CssWidowsProperty : CssProperty, ICssWidowsProperty, ICssProperty

Information can be found on MDN: https://developer.mozilla.org/en-US/docs/Web/CSS/widows

public int Count { get; }

Gets the number of lines, which must be left on top of a new page, on a paged media.

public void SetCount(int value)