Teness

public static void Fade (this UIView view, bool isIn, double duration = 0.3, Action onFinished = null)
{
	var minAlpha = (nfloat)0.0f;
	var maxAlpha = (nfloat)1.0f;

	view.Alpha = isIn ? minAlpha : maxAlpha;
	view.Transform = CGAffineTransform.MakeIdentity ();
	UIView.Animate (duration, 0, UIViewAnimationOptions.CurveEaseInOut,
		() => {
			view.Alpha = isIn ? maxAlpha : minAlpha;

Teness

//
//  ImageMeter.cs
//  Created by Alexey Kinev on 9 May 2015.
//
//      No Rights Reserved
//      http://creativecommons.org/publicdomain/zero/1.0/
//
// Get image size by name in Xamarin.Forms for iOS and Android platforms.
//
using System;

Teness

//
//  Avatar.cs
//  Created by Alexey Kinev on 26 Feb 2015.
//
//    Licensed under The MIT License (MIT)
//    http://opensource.org/licenses/MIT
//
// Simple rounded avatar class example for Xamarin.Forms.
//
using System;

Teness

//
//  TextMeter.cs
//  Created by Alexey Kinev on 11 Feb 2015.
//
//    Licensed under The MIT License (MIT)
//    http://opensource.org/licenses/MIT
//
//    Copyright (c) 2015 Alexey Kinev <alexey.rudy@gmail.com>
//
//  Usage example:

Teness

//
//  Countdown.cs
//  Created by Alexey Kinev on 11 Jan 2015.
//
//    Licensed under The MIT License (MIT)
//    http://opensource.org/licenses/MIT
//
//    Copyright (c) 2015 Alexey Kinev <alexey.rudy@gmail.com>
//
using System;

Teness

//
//  Badge.cs
//  Created by Alexey Kinev on 19 Jan 2015.
//
//    Licensed under The MIT License (MIT)
//    http://opensource.org/licenses/MIT
//
//    Copyright (c) 2015 Alexey Kinev <alexey.rudy@gmail.com>
//
using System;