A slider control can be customized by changing the image used for the drag-able portion, or by changing the colors of the control, like this:

See the Specify Slider Value recipe for instructions on creating slider controls. To change the appearance of a slider:

1. To set the slider’s “thumb” to an image:

sliderImage.SetThumbImage(UIImage.FromFile("29_icon.png"), UIControlState.Normal);

2. Or to set the colors of each different element of a slider:

sliderColor.ThumbTintColor = UIColor.Red;
sliderColor.MinimumTrackTintColor = UIColor.Orange;
sliderColor.MaximumTrackTintColor = UIColor.Yellow;