Since iOS does not provide a default glossy button implementation I wrote my own, based mostly on looking at a screenshot of Apple's own.
Some folks have been using the UIGlassButton generator, but I have wanted for a while to have this functionality avaialble at runtime, and not depend on pre-generated images, these are created at runtime, and behave just like a regular button:
You can find my implementation as part of MonoTouch.Dialog on github.
This is how you would use it, and how you can customize some of its elements:
var b = new GlassButton (bounds) { Font = UIFont.BoldSystemFontOfSize (22), NormalColor = UIColor.Green, HighlightedColor = UIColor.Red }; b.SetTitle ("Dismiss", UIControlState.Normal); container.AddSubview (b);