C# application to connect to a mobile application using bluetooth - c#

I`m asking this question again as I got no answer for about a week now ...
I want to know how to write a C# desktop application that can connect to the mobile version of the same application (that I will create). The desktop application will be used as a backup/restore for the mobile application.
I want to know also how to write the mobile version (using C# if possible).

May i know, in what way you want to communicate with the mobile version of the application? Ideally the cross domain/application communication is possible using services(WCF/Webservices).
I hope the following link may be useful for you : Bluetooth in C#, Which stack, Which SDK?

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how to get open window store app using C# windows application and get uwp installed list

how to open windows stores app uwp app using C# windows application
How to open a windows stores app using C# windows application
using Process.Start("");
How to open any voice command like cortana ?
not sure you can link to the exe since it's a UWP app but fortunately it supports protocol activivation so causing this to work
Process.Start("ms-windows-store://");
Regarding #2,
To build skills (in US markets in English, including Cortana) start here:
botframework then skills kit
If you don't want to build skills but just want STT/TTS, start here:
Bing Speech

UWP app and WPF app communication through local network

What is the best approach to communicate between UWP app (client app) installed on phone and WPF app itself installed on local machine if they are connected to the same router? Files should sync from client to server and vice versa.
As I investigated before there are WCF, Sockets, and Web. So what is the best one to use to create such functionality?
It does not matter if the app is WPF or UWP. To choose framework like WCF or Sockets you need to know how complex your scenario is. If it is rather simple, I would advice agains WCF. It can be unnecessary complicated for basic usage. You can try web api - lite system using JSON. Generally speaking, I do recommend the framework enabling http protocol as it is reusable for almost every scenario. But that is not filter that would help you much :D
For UWP that have not allowed calling localhost and you can use it to communicate to local wpf app.
More details here and here.
But you can make the uwp communicate to local wpf app in debug, see Deploying and debugging Universal Windows Platform (UWP) apps - UWP app developer | Microsoft Docs
If you want your uwp app can use localhost in release that you should use checknetisolation and you can see some way to use wcf in the article.

developing UWP Remote dekstop viewer

I wants to develop a UWP remote desktop viewer application. I had already gone through many tutorials but those are all of winform application and I can't port them into uwp. So that desktop can be viewed from windows 10 mobile. I have zero knowledge regarding this so anyone can help me from where should I start and also if someone having UWP remote desktop code so that I can understand its working easily.
I am afraid you cannot develop such application easily in the Universal Windows Platform. Microsoft has its own Remote Desktop app, but it is definitely using some APIs which are not publicly available for the connection to remote computer.
To develop such app you would need to capture / record the screen on desktop as well as capture all input and relay the input from the remote device to the source.
You could create the desktop side of the app using Windows Forms / WPF and connect to it remotely from a phone, which would just act as a display and would capture and send the user input to the desktop counterpart.
There is also a small chance you could implement the desktop app in UWP with the help of Brokered Windows Runtime components, but that would be very tedious work.
Once again however, developing this is a major task, which is more suitable for a team of developers.

Developing Android Web App Vs Native App

I am new to mobile development and I have read through the Native app Vs Mobile app pro's and con's but I would like some advice on which path I should take in building my mobile application.
Basically the back end is written in .NET and the desktop application is in C# (I am building a mobile version for the desktop application). The application itself will require an internet connection and not much else (think of google search/facebook). With this in mind, should I be writing the application as a Mobile web application in C# or build a native app for android?
Thanks.
Native Android Apps are typically written in Java. Monodroid lets you write them in C#, but I'm not sure the state of the project.
HTML5/JS apps are written using HTML5/JS/CSS and typically involve a toolkit like Phonegap.
Since you are aware of the pro's and con's, I think it's best to choose a platform where you can best utilize your skillset. Is that HTML5/JS or Java (or using C# via Monodroid).

MonoTouch connect to Azure ACS, Azure SQL / Azure WCF

I'm going to make the iOS application and wondering on differences between development with new language Objective C with Cocoa or old language C# with Mono-Touch
The requirement of the application should be work with azure and store/retrieve information to store on local device frequently, content browsing and token login to the portal, the deadline is 2 month from today and i never develop any iPhone / iPad application previously. May i know which is easier to start and is there any resources for Mono ? while i find it's great if i could use the old programming language but seem there're no such thing to support monoTouch azure development...
Thank you for reply.
First of all your have asked lots of things in one post. About your first question the answer is very much subjective. Objective C/Cocoa is native language for iOS development however using MonoTouch, will require you to depend on whatever is provided by MonoTouch. So if it is not part of MonoTouch you wouldn't be able to do it. Here you can find lots of opinions by other fellow SO users: MonoTouch & C# VS Objective C for iphone app
I can give you some guidance on Windows Azure development from any mobile device. Connecting to different services running on Windows Azure from any mobile device is same. Most of the services provide direct HTTP/HTTPS connection if the application is running on Azure and exposed an HTTP or HTTPs endpoint or for Azure Storage you are making direct RESTful call from you code. So it does not matter which coding language you will use in mobile decide, you sure can connect to Windows Azure with native language.
So if you choose Objective C then you can use iOS SDK for Windows Azure. However if you decide to use MonoTouch, you would need to use WebClient API to create your own HTTP/HTTPS connection something described here, which could be comparative complex. On internet you may find some experiment level code to use Azure services and MonoTouch application so you may be by your own to try to get things working.
I personally will not use MonoTouch to develop application on iOS devices, if I am heavily dependent on Windows Azure Services, instead I will choose iOS Windows Azure SDK to connect Azure Service through native code.

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