Add Rider Quickstart Guide

Author: niklasweimann

Media/CreateProjectRider.gif

@@ -14,8 +14,60 @@ thanks for your interested in using [RxTelegram.Bot](https://github.com/RxTelegr
 
 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.
-> Comming soon!
+## 2. Hello World - by clicking
 
-## 3.
-> Comming soon!
+This Tutotial will not explain how to get Rider installed, but you need a working Rider installation 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://www.jetbrains.com/help/rider/Installation_guide.html) follow the offical tutorial by Jetbrains.
+
+So since you have a running Rider installation, lets begin.
+
+### 2.1 Create a Project
+
+First of all you have to create a new "Console Application" as shown in the video below.
+![Creating a new Project in Rider](../Media/CreateProjectRider.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/InstallNugetPackageRider.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 bot number {me.Id}. My name is {me.FirstName}."
+            );
+        }
+    }
+}
+```
+
+## 3. Run your programm
+
+The last step is quid simple. Just click on the "Bug" button and your awesome Project will start.
+![Running the project](../Media/RunProjectRider.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/InstallNugetPackageRider.gif

@@ -44,7 +44,7 @@ Just open up your Terminal in a new Folder and run the following commands.
                 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}."
+                    $"Hello, World! I am bot number {me.Id}. My name is {me.FirstName}."
                 );
             }
         }

Media/RunProjectRider.jpg

@@ -46,7 +46,7 @@ namespace Awesome {
             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}."
+                $"Hello, World! I am bot number {me.Id}. My name is {me.FirstName}."
             );
         }
     }