AngleSharp by Florian Rappl

<PackageReference Include="AngleSharp" Version="0.6.0" />

.NET API 844,288 bytes

 HTMLFrameSetElement

sealed class HTMLFrameSetElement : HTMLElement
Represents the HTML frameset element. Obsolete since HTML 4.01.
public int Columns { get; set; }

Gets or sets the number of columns of frames in the frameset. .

public int Rows { get; set; }

Gets or sets the number of rows of frames in the frameset.