Clear UIToolbar

using System;
using System.Drawing;
using MonoTouch.UIKit;
using MonoTouch.Foundation;
using MonoTouch.CoreGraphics;

public class SplatClearToolbar: UIToolbar
{
	UIViewController vc;
	
	public SplatClearToolbar (UIViewController vc) : base ()
	{
		this.vc = vc; // hang around the reference for custom actions needed
		
		BarStyle = UIBarStyle.Black;
		//TintColor = SOMEUICOLOR; // Use to tint your buttons
		
		// need to draw a proper clear context as image to fill the toolbar for iOS 5+
		RectangleF rect = new RectangleF(0, 0, 1, 1);
		UIGraphics.BeginImageContext(new SizeF(1.0f,1.0f));
		CGContext context = UIGraphics.GetCurrentContext();
		UIColor.Clear.SetFill();
		context.FillRect(rect);
		UIImage transparentImage = UIGraphics.GetImageFromCurrentImageContext();
		SetBackgroundImage(transparentImage, UIToolbarPosition.Any, UIBarMetrics.Default);
		context.RestoreState();
		
		Frame = GetFrame (); // setup your frame as necessary
		BindYourButtons(); // add and align your buttons to the toolbar
	}
	
	private void GetFrame()
	{
		throw NotImplementedException;
	}
	
	private void GetButtons()
	{
		throw NotImplementedException;
	}
}

This Gist is how I got a clear toolbar to finally work in a subclassed UIToolbar in MonoTouch for iOS 5.0+