FootnoteOptionsColumns Property

public int Columns { get; set; }

Public Property Columns As Integer
	Get
	Set

public:
property int Columns {
	int get ();
	void set (int value);
}

member Columns : int with get, set

Document doc = new Document(MyDir + "Footnotes and endnotes.docx");

// Let's change number of columns for footnotes on page. If columns value is 0 than footnotes area
// is formatted with a number of columns based on the number of columns on the displayed page
doc.FootnoteOptions.Columns = 2;
doc.Save(ArtifactsDir + "Document.FootnoteColumns.docx");