myPlot.Add.Signal(Generate.Sin());
myPlot.Add.Signal(Generate.Cos());

var axLine1 = myPlot.Add.VerticalLine(42);
axLine1.Text = "Line 1";
axLine1.Label.Rotation = -90;
axLine1.UseAutoAlignment = false;   // Disable automatic alignment
axLine1.Label.Alignment = Alignment.MiddleRight;

var axLine2 = myPlot.Add.HorizontalLine(0.75);
axLine2.Text = "Line 2";
axLine2.Label.Rotation = 0;
axLine2.UseAutoAlignment = false;   // Disable automatic alignment
axLine2.Label.Alignment = Alignment.MiddleRight;

// extra padding on the bottom and left for the rotated labels
myPlot.Axes.Bottom.MinimumSize = 60;
myPlot.Axes.Left.MinimumSize = 60;