/// <summary>
/// Returns a value that indicates whether the drawing curve is a bend line.
/// </summary>
/// <param name="drawingCurve">
/// The <see cref="DrawingCurve"/> instance that this extension method affects.</param>
/// <returns><c>true</c> if the drawing curve is a bend line, <c>false</c> otherwise.</returns>
/// <exception cref="ArgumentNullException"><paramref name="drawingCurve"/> is <c>null</c>.</exception>
public static bool IsBendLine(this DrawingCurve drawingCurve)
{
if (drawingCurve == null)
{
throw new ArgumentNullException(nameof(drawingCurve));
}
return(drawingCurve.IsLine() && (
drawingCurve.EdgeType == DrawingEdgeTypeEnum.kBendDownEdge ||
drawingCurve.EdgeType == DrawingEdgeTypeEnum.kBendUpEdge
));
}
