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You have completed Intermediate C#!
You have completed Intermediate C#!
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Welcome to Intermediate C#! This is what we'll be learning.
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[MUSIC]
0:00
Hello and welcome, I'm Jeremy.
0:04
If you've started learning C# by
taking the courses here at treehouse,
0:07
then you've already learned a lot
about the C# programming language.
0:11
With what you've learned so
0:15
far, you can do a lot and I hope you had
the chance to write some code on your own.
0:16
In the C# objects course we learned
about object oriented programming.
0:20
If you remember, object oriented
programming makes it easier to think about
0:26
architect in software programs
because we can think about software
0:30
as a number of different objects
that interact with each other.
0:34
Because object oriented programming
naturally breaks the program into types
0:38
of objects, object oriented code
is easier to reuse and maintain.
0:42
In this course we'll learn some slightly
more advanced concepts of object oriented
0:48
programming and see how these
concepts are supported by C#.
0:53
These language features and principles
are used by most object oriented programs.
0:58
This is especially so
in software frameworks.
1:03
Frameworks such as the .NET framework, for
1:06
example, are libraries of code that can be
used by including them in our own code.
1:09
Frameworks are what make
it possible to easily write
1:13
large software programs such as websites,
games, interactive desktop software,
1:17
mobile device applications and
so much more.
1:22
You may find yourself writing
your own frameworks and
1:25
libraries that'll be used by
other software developers.
1:28
If so you'll likely be using much
of what you learn in this course.
1:31
In any case,
knowing how these language features work
1:36
will help you understand how to work
with existing libraries and frameworks.
1:39
Later, when we learn more about using
the various classes provided by the .NET
1:44
Framework, you'll be grateful you
have a good grasp on these concepts.
1:48
You may recall that there are four
principles of object-oriented programming.
1:53
The principles we've learned so
far are inheritance and encapsulation.
1:58
We'll briefly review these principles
here and learn about two more,
2:03
polymorphism and abstraction.
2:08
These terms sound really technical but
2:10
the concepts they represent
are actually quite straightforward.
2:12
This course will build on top of what we
already know about C#, I recommend you
2:16
follow the links in the teacher's notes if
you haven't completed the prerequisites.
2:21
Or if you feel like you need to review,
2:26
you can always do a quick refresher by
watching some of those videos again.
2:27
We started learning about object oriented
programming in the C# Objects course where
2:32
we wrote the code for a tower defense
game called Treehouse Defense.
2:37
We'll use what we learn in this
course to make it easier to extend
2:42
the Treehouse Defense game.
2:45
To extend code means to add
capabilities to it without
2:47
rewriting any of the original code.
2:50
When we're done it will be possible to
add different types of invaders and
2:53
powers to the game with minimal effort.
2:57
This sounds like a lot of fun and
I'm excited to get going.
3:00
Let's begin by taking a look at the code
that we ended with in C# objects
3:04
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