C#, .NET, Visual Studio Overview
Telerik Academy Alpha

 

Table of contents

What && Why?

 

 Why C#?

  • C# is one of the languages available in the .NET framework

    • ​Most widely used CLI language

  • C# is very similar to other object-oriented programming languages, but it has a unique set of features:

    • Built-in functional programming capabilities

    • Built-in asynchronous programming capabilities

    • Native garbage collection

    • Type safety

 Why C#?

  • In short

    • ​​​Supported by Microsoft

    • ​Very popular

    • Not very steep learning curve

    • Type safe

    • Built in memory management

 Why C#?

 What is .NET?

 What .NET?

  • .NET is a free, cross-platform, open source developer platform for building many different types of applications.

  • With .NET, you can use multiple languages, editors, and libraries to build for web, mobile, desktop, gaming, and IoT.

How it works?

Under the hood

 How it works?

  • Visual Studio 2017
    • Create new project
      • Console Application

 How it works?

  • Hit
    • Ctrl+F5
    • or Build => Build Solution
  • What does a Console Application produce?
    • Any ideas?
  • ANSWER: .exe file

 How it works?

  • Where to find it
    • It is in .bin folder of your project
    • An .exe file with the name of the project
  • But how does Visual Studio knows what to do?
    • It is not magic
    • It just runs a program (compiler) which builds the project and creates the .exe file for you

 How it works?

  • Just open the Developer Command Prompt for VS2017/15
    • It is enhanced Command Prompt in Windows
  • Navigate to the folder with your project
  • type "csc Program.cs" (or the name of the file)
    • And voila - you have a Program.exe file 
    • type Program.exe in the console

Libraries

 Libraries

  • Does anyone here knows how to calculate very big numbers in C#?
    • That's right - BigInteger
  • How we add this library?
    • We add System.Numerics as a Reference

 NuGet

  • What actually is the library in C#
    • It is just a .dll file
      • Don't remember the extension for now
    • It is just a program without a Main method
  • ​But how do we add more libraries?
    • There is a package manager called NuGet

 NuGet

Hints

 Debugging!!!

  • Please, please, please DEBUG your program
    • There is no other way to find your bugs
      • For now :)

Questions?

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