Edited wording and added emojis

2-csharp/README.md

@@ -1,4 +1,4 @@
-# C# Crash Course
+# C# Crash Course 🚀
 
 In this C# Crash Course, we'll go over the basics of C# so that you'll be ready to build out exciting web apps! We'll start by going through the key attributes of C#, syntax basics, and introduce you to OOP. In each section, we'll link you to some quick in-browser C# challenges so you can apply these concepts.
 
@@ -25,6 +25,7 @@ A **compiler** converts the code you write into a format that your computer can
 ---
 
 # The basics
+## 🌍 Hello World
 Here's a piece of code that will print "Hello world!" to the console.
 
 ```csharp
@@ -32,15 +33,23 @@ using System;
 
 Console.WriteLine("Hello world!");
 ```
+
 ## Keywords
-With C#, you use **keywords** like *using* and *Console*.
+With C#, you use keywords like `using` and `Console`.
 **Keywords** are predefined, reserved identifiers that have special meanings to the compiler.
 
 ## Accessing methods
-The `. (DOT)` in *Console.WriteLine* allows us to access methods and properties. In this example, **Console** is a type that represents the console window. **WriteLine** is a method of the Console type that prints a line of text to that text console.
+The `. (DOT)` in `Console.WriteLine` allows us to access methods and properties. In this example, `Console` is a type that represents the console window. `WriteLine` is a method of the Console type that prints a line of text to that text console.
 
 ## Parameters
-In this example, we use parentheses pass a string as a parameter to *Console.WriteLine*. 
+In this example, we use parentheses pass a string as a parameter to `Console.WriteLine`. 
+
+## 🚨 Challenge 1 
+Time for your first challenge!
+
+| # | Challenge  | Solution   | Duration   | What you will learn | More information |
+|-| ------------------------------- | ------------------------------- | ----------- |  -------------------------------------- | - |
+1 | [Hello World Challenge](https://docs.microsoft.com/learn/modules/csharp-write-first/2-exercise-hello-world/?ns-enrollment-type=learningpath&ns-enrollment-id=learn.languages.csharp-first-steps)| N/A | 3 min |  case sensitive, strings, comments | [Intro to C# Tutorial](https://docs.microsoft.com/dotnet/csharp/tour-of-csharp/tutorials/hello-world?WT.mc_id=csharpnotebook-35129-website), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
 
 ## Variables
 In C#, **variables** allow you to temporarily store a value in memory. In C#, you must declare a variable before using it. 
@@ -51,6 +60,11 @@ In this example, we created a string called `cSharp`. You can use the var keywor
   
 Variable names can contain alphanumeric characters and underscores, but no special characters. They also cannot be keywords.
 
+## 🚨 Challenge 2
+| # | Challenge  | Solution   | Duration   | What you will learn | More information |
+|-| ------------------------------- | ------------------------------- | ----------- |  -------------------------------------- | - |
+2 | [Variables Challenge](https://docs.microsoft.com/learn/modules/csharp-literals-variables/6-challenge )|[Solution](https://docs.microsoft.com/learn/modules/csharp-literals-variables/7-solution)| 5 min |  variables, data types, strings, ints, decimals | [String formatting tutorial](https://docs.microsoft.com/learn/modules/csharp-basic-formatting/), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
+
 # Syntax cheat sheet
 ## Semicolons
   Every statement is ended by a semicolon
@@ -66,6 +80,8 @@ Variable names can contain alphanumeric characters and underscores, but no speci
   C# is case sensitive! For example, a variable "cat" is completely different from a variable "CAT".
     ```csharp
     var cat = "meow";
+    ```
+    ```csharp
     var CAT = "rawr";
     ```
 
@@ -81,8 +97,28 @@ Variable names can contain alphanumeric characters and underscores, but no speci
    | ++ | increment |
    | -- | decrement |
 
+## 🚨 Challenge 3
+| # | Challenge  | Solution   | Duration   | What you will learn | More information |
+|-| ------------------------------- | ------------------------------- | ----------- |  -------------------------------------- | - |
+3 | [Operating on numbers challenge](https://docs.microsoft.com/learn/modules/csharp-basic-operations/5-challenge)|[Solution](https://docs.microsoft.com/learn/modules/csharp-basic-operations/6-solution)| 2 min |  ints, decimals | [Number operations tutorial](https://docs.microsoft.com/learn/modules/csharp-basic-operations/), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
+
+## Decision logic
+In C#, you can build applications that employ decision-making logic so that your application performs different instructions based on a set of conditions. One way we do this is with an `if` statement. `if` statements are made up of three parts:
+* The if keyword
+* A Boolean expression between parenthesis ()
+* A code block defined by curly braces { }
+
+If there are multiple condition, you can utilize the `else if` and `else` statements. Basically, if the `if` statement fails, these other statements allow you to test against other conditions.
+You can imagine this in the context of a rock⛰️-paper📃-scissors✂️ game. Imagine you chose rock⛰️. 
+`if` your opponent chooses scissors✂️, then you will win
+`else if` your opponent also chooses rock⛰️, then you will tie
+`else` your opponent chooses paper📃, then you will lose
+
+Each possible decision your opponent could make leads to a different outcome.
+
+
 ## Boolean expressions
-  We use booleans to compare two or more things.
+  Booleans are expressions that return either `true` or `false`. They are often used to compare two or more things.
   | symbol | what it does |
   | --- | ---------- |
   | < | less than |
@@ -92,6 +128,11 @@ Variable names can contain alphanumeric characters and underscores, but no speci
   | == | equal |
   | != | not equal |
 
+## 🚨 Challenge 4
+| # | Challenge  | Solution   | Duration   | What you will learn | More information |
+|-| ------------------------------- | ------------------------------- | ----------- |  -------------------------------------- | - |
+4 | [Decision logic challenge](https://docs.microsoft.com/learn/modules/csharp-if-elseif-else/4-challenge)|[Solution](https://docs.microsoft.com/learn/modules/csharp-if-elseif-else/5-solution)| 2 min |  if, else if, else, booleans | [Boolean expressions tutorial](https://docs.microsoft.com/learn/modules/csharp-evaluate-boolean-expressions/1-introduction), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
+   
 ---
 
 # Object Oriented Programming
@@ -104,6 +145,12 @@ Objects inherently have attributes. In C# we call these **properties**. The attr
 
 We can also define **methods** which describe what an object can do. For example, you can sell your house. 
 
+To summarize these concepts using our house example,
+A Class is like a blueprint 📜
+An Object is an instance of this blueprint, or a house 🏠
+The Properties of a house could be the number of doors it has or the color it's painted 🚪 🎨
+A Method of our class is that we can sell our house 💸
+
 Let's look at an example House class:
 ```csharp
 // The namespace declaration provides a way to logically organize your classes
@@ -131,7 +178,7 @@ public House(string address, int squareFeet)
     this.Size = squareFeet;
 }
 ```
-When we create an object with **new** this constructor will be called.
+When we create an object with `new` this constructor will be called.
 ```csharp
 using Classes;
 
@@ -139,15 +186,14 @@ using Classes;
 var house = new House("123 Candy Cane Lane", 1500);
 ```
 
-# Mini Challenges!
+## The .NET Class Library
-Each of these mini challenges is designed so that you can apply C# concepts to mini coding exercises. These challenges are all sourced from Microsoft documentation and will allow you to get coding inside your browser. Easy peasy!
+C# also has built in classes and functionality within the .NET Class Library. The .NET Class Library is a collection of thousands of classes containing tens of thousands of methods. These methods are created by Microsoft and are available for use in your applications. For example, when we called `Console.WriteLine` earlier, we were calling a method from the `System.Console` class. For a more in-depth overview, you can read up on the .NET Class Library in the [.NET documentation](https://docs.microsoft.com/dotnet/standard/class-library-overview).
 
+## 🚨 Challenge 5
 | # | Challenge  | Solution   | Duration   | What you will learn | More information |
 |-| ------------------------------- | ------------------------------- | ----------- |  -------------------------------------- | - |
-1 | [Hello World](https://docs.microsoft.com/learn/modules/csharp-write-first/2-exercise-hello-world/?ns-enrollment-type=learningpath&ns-enrollment-id=learn.languages.csharp-first-steps)| N/A | 3 min |  case sensitive, strings, comments | [Intro to C# Tutorial](https://docs.microsoft.com/dotnet/csharp/tour-of-csharp/tutorials/hello-world?WT.mc_id=csharpnotebook-35129-website), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
+5 | [.NET Class Library challenge](https://docs.microsoft.com/learn/modules/csharp-call-methods/5-challenge)|[Solution](https://docs.microsoft.com/learn/modules/csharp-call-methods/6-solution)| 2 min |  ints, decimals | [.NET documentation](https://docs.microsoft.com/dotnet/standard/class-library-overview), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
-2 | [Variables](https://docs.microsoft.com/learn/modules/csharp-literals-variables/6-challenge )|[Solution](https://docs.microsoft.com/learn/modules/csharp-literals-variables/7-solution)| 5 min |  variables, data types, strings, ints, decimals | [String formatting tutorial](https://docs.microsoft.com/learn/modules/csharp-basic-formatting/), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
+
-3 | [Operating on numbers](https://docs.microsoft.com/learn/modules/csharp-basic-operations/5-challenge)|[Solution](https://docs.microsoft.com/learn/modules/csharp-basic-operations/6-solution)| 2 min |  ints, decimals | [Number operations tutorial](https://docs.microsoft.com/learn/modules/csharp-basic-operations/), [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
-4 | [Making clean code](https://docs.microsoft.com/learn/modules/csharp-readable-code/5-challenge)|[Solution](https://docs.microsoft.com/learn/modules/csharp-readable-code/6-solution)| 5 min |  topics | [C# coding conventions](https://docs.microsoft.com/dotnet/csharp/fundamentals/coding-style/coding-conventions) | [C# documentation](https://docs.microsoft.com/dotnet/csharp/) |
 
 
 # Bonus and more ways to connect