What are the commonly used classes and namespaces in C#?

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. The following are some commonly used C# classes and namespaces:

1. System.Console: Provides functions for interacting with the console, such as input and output.

2. System.Data: Provides access and operations to the database, such as connecting to the database, querying data, updating data, etc.

3. System.Drawing: Provides graphics and image processing functions, such as drawing graphics, operating images, etc.

4. System.IO: Provides file and directory operation functions, such as reading and writing files, creating directories, etc.

5. System.Net: Provides network communication functions, such as sending HTTP requests, receiving emails, etc.

6. System.Text: Provides text processing functions, such as string operations, regular expressions, etc.

7. System.Threading: Provides thread and synchronization operation functions, such as creating threads, synchronization methods, etc.

8. System.Windows.Forms: Provides functions for Windows desktop application development, such as creating windows, buttons, list boxes, etc.

9. System.Web: Provides functions for Web application development, such as processing HTTP requests, accessing databases, etc.

10. System.Xml: Provides XML document processing functions, such as reading and writing XML documents, parsing XML documents, etc.

In addition to the above namespaces, C# also provides many other namespaces, such as System.Collections (providing collection classes), System.Linq (providing LINQ query functions), System.Security (providing security-related functions )wait.

In actual development, developers can choose appropriate namespaces and classes based on project needs and their own skills. At the same time, with. NET Framework and . NET Core With the development of C# classes and namespaces, C# classes and namespaces are constantly being expanded and updated, providing developers with more functions and choices.

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