C# Use Cases with Example Source Code

C# (pronounced “C sharp”) is a robust and versatile programming language used in a wide range of applications, from building desktop and web applications to developing video games and mobile apps. In this article, we will explore the different use cases for C# and provide source code examples.

Desktop and Web Applications with C#

C# is primarily used for building desktop and web applications, particularly with the .NET framework. The language provides a range of tools and libraries for developing robust and scalable applications.

Here is an example of using C# to create a basic desktop application with Windows Forms:

 using System;
using System.Windows.Forms;

public class MyForm : Form {
    private Button button;

    public MyForm() {
        Text = "Hello, World!";
        button = new Button();
        button.Text = "Click me!";
        button.Click += new EventHandler(Button_Click);
        Controls.Add(button);
    }

    private void Button_Click(object sender, EventArgs e) {
        MessageBox.Show("Hello, World!");
    }

    public static void Main() {
        Application.Run(new MyForm());
    }
}

Here is an example of using C# to create a basic web application with ASP.NET:
 using System;
using System.Web;
using System.Web.UI;
using System.Web.UI.WebControls;

public class MyPage : Page {
    private Button button;
    private Label label;

    public MyPage() {
        button = new Button();
        button.Text = "Click me!";
        button.Click += new EventHandler(Button_Click);
        label = new Label();
        Controls.Add(button);
        Controls.Add(label);
    }

    private void Button_Click(object sender, EventArgs e) {
        label.Text = "Hello, World!";
    }
}
 

Game Development with C#
C# is also widely used for game development, particularly for building games with the Unity game engine. Unity provides a range of tools and libraries for developing high-performance games, making C# a top choice for developers in this field.
Here is an example of using C# with Unity to create a basic game:
 using UnityEngine;

public class MyScript : MonoBehaviour {
    public GameObject cube;

    void Start() {
        Instantiate(cube, new Vector3(0, 0, 0), Quaternion.identity);
    }

    void Update() {
        float moveHorizontal = Input.GetAxis("Horizontal");
        float moveVertical = Input.GetAxis("Vertical");

        transform.position += new Vector3(moveHorizontal, 0, moveVertical);
    }
}
 
Mobile App Development with C#
C# is also used for mobile app development, particularly for building mobile apps with Xamarin. Xamarin allows developers to use C# to build cross-platform mobile apps.
Here is an example of using C# with Xamarin to create a basic mobile app:
using System;
using Xamarin.Forms;

public class MyPage : ContentPage {
    private Button button;
    private Label label;

    public MyPage() {
        button = new Button();
        button.Text = "Click me!";
        button.Clicked += Button_Click;
        label = new Label();
        Content = new StackLayout {
            Children = {
                button,
                label
            }
        };
    }

    private void Button_Click(object sender, EventArgs e) {
        label.Text = "Hello, World!";
    }
}
 
Conclusion
C# is a robust and versatile programming language used in a wide range of applications, from building desktop and web applications to developing video games and mobile apps. With its range of tools and libraries, C# remains a top choice for developers looking to build robust and scalable applications. Whether you’re a beginner or an experienced developer, C# is a programming language that offers a lot of potential for growth and innovation. Its syntax is easy to learn, making it an attractive option for beginners, but it also offers advanced features for experienced developers, making it a powerful tool for building sophisticated applications.
C# is also known for its strong support for object-oriented programming, making it a popular choice for building large-scale applications with complex data models. Its integration with the .NET framework and other development tools, such as Visual Studio, also make it a popular choice among developers.
Overall, C# is a powerful and versatile programming language that offers a lot of potential for developers. Its wide range of use cases and ease of use make it an attractive option for developers looking to build a variety of applications.