C#

C# is a modern, object-oriented programming language from Microsoft. It is mainly used with the .NET platform. Windows programs, web applications, games, and server services can be built with C#.

C# is a high-level language. Its syntax is close to Java and the C family, so it is relatively readable if you already know one of those languages. It uses strong type checking: a variable's type is known in advance, and many mistakes show up before the program runs.

C# is no longer only for Windows. .NET can run on several operating systems. The Unity engine also uses C# widely for making games.

C# is used in many areas:

• Windows and desktop programs
• The server side of websites and APIs
• Games with Unity
• Enterprise and business systems
• Cloud services
• Mobile and cross-platform apps with .NET
• Desktop tools and automation

ASP.NET is a common choice for web applications, and Unity is a common choice for games. The language itself is not limited to those areas.

You can write many kinds of programs in C#:

• Web applications and APIs
• Desktop programs
• 2D and 3D games
• Systems that work with databases
• Internal business software
• Small console tools

A simple example

using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, Nibras Code!");
    }
}

This program writes a greeting to the console.

You can start learning C#. The first program is not hard. To go further, you need to understand types, classes, and the object-oriented structure.

This order is useful at the beginning:

1. Variables and types
2. Conditions and loops
3. Methods
4. Arrays and lists
5. Classes and objects
6. Interfaces
7. Handling errors
8. A small console or Unity project

Good progress comes from writing small programs, not only from reading.

Advantages

• It has a clear and strict type system
• The .NET libraries are broad
• It is well supported for Windows, the web, and Unity games
• It has modern features such as async, LINQ, and generics
• Tools such as Visual Studio make the work comfortable
• .NET can run on more than one operating system

Disadvantages

• For very short scripts, a language such as Python can feel lighter
• Object-oriented ideas can look difficult at first
• Some examples are tied to Microsoft tools, which can make the choice confusing
• The project structure can feel heavy for a tiny program

A C# program usually starts with a class and a Main method. Main is the entry point.

Variables

string name = "Ali";
int age = 20;

Condition

if (age >= 18)
{
    Console.WriteLine("Adult");
}

Loop

for (int i = 1; i <= 5; i++)
{
    Console.WriteLine(i);
}

Method

static int Add(int a, int b)
{
    return a + b;
}

A greeting

using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, world!");
    }
}

The sum of two numbers

using System;

class Program
{
    static void Main()
    {
        int a = 10;
        int b = 20;
        Console.WriteLine(a + b);
    }
}

A condition

using System;

class Program
{
    static void Main()
    {
        int number = 10;
        if (number > 0)
        {
            Console.WriteLine("Positive number");
        }
    }
}

What is C#?

C# is an object-oriented programming language widely used on the .NET platform.

Is C# free?

The .NET SDK and the C# compiler can be used for free. Visual Studio also has a free Community edition. License terms depend on the tool you choose.

Can C# be used to make games?

Yes. C# is the main scripting language in the Unity game engine.

Is C# only for Windows?

No. .NET can run on several systems, including Linux and macOS. Windows applications are one of its strong areas.

Can C# be used to build a website?

Yes. ASP.NET is used to write server-side web applications and APIs.

Are C# and C++ the same language?

No. The names are close, but C# and C++ are different languages and are chosen for different jobs.

Is C# suitable for beginners?

Yes. It can be a first language. Types and classes need calm, repeated practice.