How to create and run your first C# program

C# is an object-oriented programming language developed by Microsoft and is widely used in Windows desktop applications, Web applications, game development, mobile applications and other fields. C# provides rich classes and namespaces that can help developers quickly build high-quality applications. To create and run your first C# program, you need to complete the following steps:

1. Install a development environment: First, you need to install a C# development environment. You can use Visual Studio Community (free and full-featured IDE), or use Visual Studio Code (free and lightweight code editor). If you're using Windows, it's still available. NET Framework or. NET Core SDK.

2. Create a new project: Open Visual Studio or Visual Studio Code, and then create a new project. In Visual Studio , select Create a new project, and in Visual Studio Code, select Open folder and select a folder that contains your existing code.

3. Write code: Create a C# file in the project, such as "Program.cs". In this file, write the following code:

using System;
namespace HelloWorld
{
class Program
{
static void Main(string[] args)
{
Console.WriteLine("Hello, World!");
}
}
}

This code defines a namespace called "HelloWorld" that contains a class called "Program". The class has a static method called "Main" which is The entry point of the C# program. When the program runs, it will print "Hello, World!" to the console.

4. Save the code: In Visual Studio, click "File" > "Save", in Visual Studio Code, press Ctrl S Save the code.

5. Run the program: In Visual Studio, click "Debug" > "Start Debugging", in Visual Studio Code, press F5 Run the program.

6. View the output: After the program runs, you should be able to see the "Hello, World!" output on the console.

At this point, you have successfully created and run your first C# program. Next, you can continue to learn the basics of the C# language, such as data types, control structures, methods, classes, and interfaces, etc., to build more complex functionality.

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