Concept about C#

Visual Studio: It is a tool that has multiple programming languages.For example C#,F#,etc.

We will use C#

• C# support Object oriented programming.
• Library base
• This has a lot of type of application, e.g console
• Unified execution: support all inside.

What is a Solution?

• A solution can contain multiple languages.
• A solution has a ".sln" extension 
• The solution is represented by folders ".sh"
• A solution contain projects

            A project has an ".csproj" extention
            The project organizes " .cs" files .

What is a namespace?

A namespace is a grouper, container or  collection logical of classes.

Using-> This brings context to that file, collections of classes contained in a namespace.

The object browser: This shows that has each library of the class or the project.
Object browser->namespace->class,structure, interface.

Creating a class library

We can attach references of other project or "ddl" file.

Example Class library don't have a main class, and library have "ddl" extension.

Execute project

Using debugging

 Execute:
start Debuggers
we will add  the following sentences :
            int number1 = 1;
            int number2 = 2;
            int sum = number1 + number2;
            Console.WriteLine("we are using a console project"+sum);
            Console.ReadLine();
In this example we want to result of two numbers and show using the console.

step over: Go to the next line
step into: Go to that line
step out: Not enter

Build or Build Solution: To Compile the Solution

Rebuild Solution: To remove the last files and generate others

Clean Solution:To delete any intermediate and output files.

We will create a class Student, we will use the class library.

•  Rename the name the library. Right click on the  "Operation" project and change the name. We also change the name the namespace and the class.

A person has name, last name,age.