Mohammed Ezzat Awad

Intro Xamarin Forms is a collection of controls that can be used and rendered on multiple platforms, and in order of them to function as they are suppose to, they do need a set of core components that defines the way these controls, in how they are created, how they are rendered to how they are used, of course every platform is different and sometimes a platform specific extra configuration is required, specially that there are so many differences between the different platforms in matter of design, user experience and operating system behavior. So one of the core components of  Xamarin  Forms is the Dependency Service, and by the name suggest it does act as the dependency resolver for all forms controls, if you are not familiar with IOC " I nversion O f C ontrol" and Dependency Injection please refer to the link for a quick intro i wrote a while ago on IOC  IOC Part 1 - Inversion of control Principle .  And as of such the Dependency Service is the concrete inboxe

Intro For a growing UI page there always comes a need to create sub views that can be used inside a bigger view, and for that we need custom controls, which are controls that are derived either from a layout or a simple view which is the basic control for almost any UI component in Xamarin forms, and therefore for a start i will use that as an example. And in such example we will create a custom control with a set of bindable properties and explain how they work, also how to add an event that can also be bound to Commands Lets Create the control  I have just went ahead and created a custom control that inherits from Xamarin.Forms.View and have some properties such color and checked all properties to be bound to by the ViewModel serving as the datacontext of the this control. here is the code below using System; using Xamarin.Forms; namespace UserControls { public class CustomView : View { public Color Color { get ; set ;