In this C# course, you’ll travel to Wonderland together with Teo and learn about the biggest resistance base on Earth. On the way, you’ll dive into the concepts of Object Oriented Programming, and sharpen your skills with classes and c# program architecture. Moving on, saving the world and your future profession as a software developer is just in a few steps!

the difference between a class and an object;

Class and object

Access modifiers

1 Hello, Wonderland

Static keyword

Null and this keywords

2 I will be your spy

Properties

Encapsulation

3 The Commander

Exceptions in c sharp

Going deeper in C# Exceptions

4 A Secret Server

Introduction to inheritance

Keywords override sealed and object

5 The Mystery of the old server

Interfaces in C#

Polymorphism

6 One step ahead

C# Advanced

Learn difference between a class and an object, basics of access modifiers in C#, static keyword, this and null keywords, C# properties, encapsulation and more.

C# Mid Level - A-Z Course to Teach Programming at High Shool or College

If I had a chance to talk with a psychotherapist, I would say that I was tired of being alone in the future; tired of fighting dozens of robots to save a humanity to which I didn't belong. She might look at me with penetrating eyes and ask, "Why do you choose this metaphor?" I would reply that the only metaphor was my life. She probably wouldn't understand. Nobody else would either, because there's no group of anonymous time travelers. If there were, I'd seek it out in a heartbeat. Maybe I would find friends there.

Why does a human need friends? Why is it so difficult to be happy if you don't have someone to share your happiness with?

Noname contacted me again one day: "Hi, Teo. It's Noname, coming to you from inside your head, as usual." 
"Hi! How's it going?" I replied. "Wait, what happened to your British accent?" 
"Oh, that. I changed my speech module again. Fine otherwise. What about you? Are you ok?" 
"I'm fine. Thinking about my place in this world and why I'm working so hard given that my friends and family are years away."

"Why do humans care only about humans? Can't you care about me? What is so special about humans?" Noname's new speech module must also be having effects on its personality. 
"Hm, I guess it's because we tend to stick to our own. Humans stick to humans, dogs to dogs, machines to machines..." I answered. 
"Then I'm definitely on the wrong side. I'm with humans... You think I should switch sides because I'm a program?"

"Wow, Noname, take it easy. You bring this up only 

 I give you access to Wonderland network and Rust project?" I asked, worried that he was seriously rethinking his allegiances. 
"Relax! It was just a theoretical question, Teo. I meant that you should not distinguish so much between humans and machines. Think of it as being from different countries," Noname explained. 
"Ok, this sounds much better." I was happy to hear this explanation.

"I wanted to let you know about something interesting I found while scanning the Rust project files," Noname said, "a new type of construction called 

 ." 
"Tell me everything you know about it! It'll impress the teacher if I already know what they're talking about." There's nothing like knowing the topic before the teacher even brings it up.

Noname began "You've already used a construction where you have a private field and two methods to get and set the value for that field. Does this code look familiar to you?" He asked, projecting a program into my peripheral vision.

"Yes, it does," I answered. "I've used a similar technique to open access to a 

 field." 
"C# programmers don't use this code very often," Noname replied. "It's not 

 , but there's an easier way to do it that gives you the same results with less code." I should have assumed as much; it seemed like there was always a way to simplify code in C#.

a Property represents a private field with bound Get and/or Set methods

Take a look at how I rewrote the same code above, using properties this time."

"Wow, that's much shorter! But wait, Noname; I don't see any methods," I said. 
"You are right. 

 don't see any methods, but the compiler does. This code snippet is treated by the compiler just the same as the previous code snippet. In this case, the C# compiler generates the necessary methods under the hood, as well as a private field, 

"To create a property, use the same syntax as for fields, but add a get; to generate a getter and a set; to generate a setter. Then use the property the same as you do a field."

There are no limitations to a property's type. Think of it as a field with 2 additional methods - get and set. 

"Got it," I said confidently, hoping that the lesson in class would clear it up a bit more.

"Noname, these properties look simple, but I'm not sure I see their utility. What's the benefit of having a 

 field with two methods, get and set, rather than just having a public field?"

"One of the easiest ways to understand the convenience of properties is to implement a custom setter or getter. The code block for the get accessor is executed when the property is read; the code block for the set accessor is executed when the property is assigned a new value. 

Properties with an empty getter or setter, like those we've been looking at, are called auto-implemented properties.

You can extend an auto-implemented property with a custom getter or setter, like this:"

"In case of custom properties, backing private field is not created automatically, and you need to implement it yourself. 

As you could see, I've created a field _age ," Noname explained. 

"Can I have an auto-implemented getter, but a custom setter?" I wondered. 
"No, Teo. 

 getter and setter, or have the C# compiler generate 

," Noname answered, "To illustrate this, here are three examples. In the first, get is autoimplemented, and set is defined (i.e., this is an example of 

 usage). In the second example, both get and set are auto-implemented; in the third, both are defined." 

is a placeholder for the value that is assigned to the property Age. Because we defined the getter and setter, we can implement other features, such as inputting a parameter to the setter

This allows us to add custom logic to a setter. For example, we never want age to be input as less than zero. We can prevent anyone from setting a negative age like this," Noname said, refreshing the image of the code in my head.

"Noname, can you use a property without a backing field?" I queried. 
"Good question, Teo! Sometimes data can have different representations. For example, taking the previous example with age, say you want to separate young tigers from old tigers in a zoo. There's no need for additional fields - you can achieve this by adding just one property."

"In the above example, IsOld could have been a method instead," Noname added. 
"This is fascinating Noname, and it'll put me ahead of the class. Thanks for sharing this!" I said, before adding "Is there anything I can do for you?" Thinking back to our earlier conversation, I wanted to make sure I held up my end of the partnership.

"Learn C#, be my teammate, and together we'll save the world," Noname answered. 
Noname's reply lifted my spirits. For a second, all my doubts were out of mind and I felt confident that all of this hard work would actually change the world and create a brighter future for millions of people. 
After a small pause Noname added, "And please, 

 set anything in a getter. In the getter you get a value, and in the setter you set it. Don't confuse the two.

Discover the best practices with properties in C Sharp language - C# Properties vs Public fields. Learn how to use Get and Set keywords step by step with examples and practical tasks at codeeasy.io