WindowsPhone 8 Custom URI Scheme:Launching other own apps from your app (C#-XAML)

Introduction:

It is very easy to launch another app with your app with help of "Custom URI Scheme" concept.So it is way of promoting one app with other apps.However this post is explained about 

1)How to make custom uri scheme.

2)How to communication other own installed apps with your app.

3)How to send files between two apps

How to Launch setting page from Windows Phone 8 C# app

Introduction:

Windows Phone application is not allowed to modify some of the device’s settings directly.As a developer we can't access the phone functionality directly.And so alternative way  is "launch the settings screen " from the our app.However one of the most wanted functionality is added in "WindowsPhone 8 sdk" is "URI schemes" 

This topic lists the URI schemes that can be used to launch built-in apps. Many of the apps built into Windows Phone can be launched from your app by calling LaunchUriAsync(Uri), passing in a URI that uses the scheme associated with the app you want to launch.