private DoubleAnimation AnimateCursor = new DoubleAnimation();
private Storyboard CursorAnimation = new Storyboard();

AnimateCursor.From = 0;
AnimateCursor.To = 1150;
AnimateCursor.Duration = new Duration(TimeSpan.FromSeconds(30));
AnimateCursor.RepeatBehavior = RepeatBehavior.Forever;

Storyboard.SetTargetName(AnimateCursor, "timeCurLine");
Storyboard.SetTargetProperty(AnimateCursor, new PropertyPath(Canvas.LeftProperty));

CursorAnimation.Children.Add(AnimateCursor);

public void StartNavCursor() => CursorAnimation.Begin(timeCurLine);
public void StopNavCursor() => CursorAnimation.Stop(timeCurLine);