Add visual studio quickstart guide

Author: niklasweimann

.gitignore

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 _site
 Gemfile.lock
 node_modules
-vendor
+_vendor
+vendor

Media/CreateProjectVisualStudio.gif

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+---
+layout: default
+title: Quickstart Visual Studio
+parent: Quickstart overview
+nav_order: 2
+---
+
+# Quickstart Guide (Visual Studio)
+
+Hey 👋,
+thanks for using [RxTelegram.Bot](https://github.com/RxTelegram/RxTelegram.Bot). This quickstart guide will give you an easy 3 Steps Solution how you can get started with RxTelegram.Bot using Visual Studio. Quickstart guides are also Available for the Terminal or Rider.
+
+## 1. Bot Father
+
+Before we can get started you need to create a Telegram Bot by visiting [@BotFather](https://t.me/BotFather) with any Telegram client and create a new bot. He will give you an access token which you need to authorize your bot at every request, but do not worry we will handle this for you.
+
+## 2. Hello World - by clicking
+
+This Tutotial will not explain how to get Visual Studio installed, but you need a working Visual Studio installation __with the ".NET Core cross-platform development" workload installed__ so go and set it up. It is quite simple just ask any search engine and you will find many tutorial or click [here](https://docs.microsoft.com/en-us/visualstudio/install/install-visual-studio?view=vs-2019) follow the offical tutorial by Microsoft.
+
+So since you have a running Visual Studio installation, lets begin.
+
+### 2.1 Create a Project
+
+First of all you have to create a new "Console Project" as shown in the video below.
+![Creating a new Project in Visual Studio](../Media/CreateProjectVisualStudio.gif)
+
+### 2.2 Install RxTelegram.Bot
+
+Now you have to install the [RxTelegram.Bot](https://github.com/RxTelegram/RxTelegram.Bot) Nuget package as shown in the video below.
+![Installing RxTelegram.Bot](../Media/InstallNugetPackageVisualStudio.gif)
+
+### 2.3 Paste the code
+
+Open the ```Programm.cs``` file and paste the following content.
+
+> **Replace ACCESS_TOKEN_HERE with the access token Botfaher gave you.**
+
+```csharp
+using System;
+using RxTelegram.Bot;
+
+namespace Awesome {
+    class Program {
+        public static void Main () {
+            var botClient = new TelegramBot ("ACCESS_TOKEN_HERE");
+            var me = botClient.GetMe().Result;
+            Console.WriteLine (
+                $"Hello, World! I am user {me.Id} and my name is {me.FirstName}."
+            );
+        }
+    }
+}
+```
+
+## 3. Run your programm
+
+The last step is quid simple. Just click on the "Awesome" button and your awesome Project will start.
+![Running the project](../Media/RunProjectVisualStudio.jpg)
+
+## Troubleshooting
+
+### Invalid Bot Token
+
+```text
+Unhandled exception. RxTelegram.Bot.Exceptions.InvalidTokenException: The given bot token is not valid. See "https://core.telegram.org/bots/api#authorizing-your-bot" for further information. Token was: ACCESS_TOKEN_HERE
+   at RxTelegram.Bot.BotInfo.ValidateToken(String token)
+   at RxTelegram.Bot.BotInfo..ctor(String token)
+   at RxTelegram.Bot.TelegramBot..ctor(String token)
+   at Awesome.Program.Main() in C:\Users\nikwe\Downloads\asf\Program.cs:line 7
+```
+
+If you get an Exception like this it is most likely that you did not replaced the access token in the code sample or you copied the wrong one.

Media/InstallNugetPackageVisualStudio.gif

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 ---
 layout: default
-title: Quickstart overview
+title: Quickstart Overview
 has_child: true
 nav_order: 1
 ---
 
 # Quickstart Overview
 
-* [Quickstart Guide using the Terminal](QuickstartGuideTerminal.md)
+* [Quickstart Guide using the Terminal](QuickstartGuideTerminal.md)
+* [Quickstart Guide using the Visual Studio](QuickstartGuideVisualStudio.md)

Media/RunProjectVisualStudio.jpg

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         command: jekyll serve --host 0.0.0.0 --drafts --config _config.yml --watch --livereload --force_polling
         volumes:
             - .:/srv/jekyll
-            - ./vendor/bundle:/usr/local/bundle
+            - ./_vendor/bundle:/usr/local/bundle
 
         ports:
             - 4000:4000