Introduction: In the previous article , Chapter 6.3, we discussed the System.Collections and System.Collections.Generic namespaces, which provide classes for working with collections of objects in C# applications. In this final article of our series, we'll explore the System.Linq namespace, which offers powerful querying capabilities for collections, allowing you to filter, sort, and transform data with ease. After completing this article, you should have a solid understanding of C# and its core concepts. We encourage you to start a project to implement what you've learned and further strengthen your skills. System.Linq Namespace: The System.Linq namespace provides Language Integrated Query (LINQ) functionality, which allows you to perform complex queries on collections using a concise and expressive syntax. LINQ works with both generic and non-generic collections, as well as with other data sources like XML and relational databases. Some key features of LINQ include:

 Introduction: In the previous article , Chapter 6.2, we explored the System.Text and System.Text.Encoding namespaces, which are important for working with text and character encodings in C# applications. In this article, we'll discuss the System.Collections and System.Collections.Generic namespaces, which provide classes for working with collections of objects. In the next article, we'll dive into the System.Linq namespace, which offers powerful querying capabilities for collections. System.Collections Namespace: The System.Collections namespace provides non-generic collection classes, such as ArrayList, Hashtable, and Queue. These classes store objects, but they don't enforce type safety: ArrayList list = new ArrayList(); list.Add(42); list.Add( "Hello, world!" ); foreach ( object item in list) { // Process item } System.Collections.Generic Namespace: The System.Collections.Generic namespace offers type-safe, generic collection classe

 Introduction: In the previous article , Chapter 6.1, we discussed the System.IO namespace, which provides classes for working with files, directories, and streams. In this article, we'll explore the System.Text and System.Text.Encoding namespaces, which are important for working with text and character encodings in C# applications. In the next article, we'll discuss the System.Collections and System.Collections.Generic namespaces, which are essential for working with collections of objects. System.Text Namespace: The System.Text namespace contains classes and interfaces for working with text and character encodings. Some key classes include: StringBuilder: Provides a mutable string buffer for efficient string manipulation. Encoding: Represents a character encoding, such as UTF-8, UTF-16, or UTF-32. Decoder/Encoder: Convert between different character encodings and byte arrays. StringBuilder: The StringBuilder class is useful for efficient string manipula

 Introduction: In this new chapter, we'll explore working with .NET classes, which are essential for developing robust and efficient C# applications. In this first article, we'll discuss the System.IO namespace, which provides classes for working with files, directories, and streams. In the next article, we'll delve into the System.Text and System.Text.Encoding namespaces, which are important for working with text and character encodings. System.IO Namespace: The System.IO namespace contains classes for performing various operations on files, directories, and streams. Some key classes include: File: Provides static methods for creating, copying, deleting, and moving files, as well as opening files for reading and writing. Directory: Provides static methods for creating, deleting, and moving directories, and enumerating files and directories. FileStream: Represents a file stream, allowing you to read and write data to a file. StreamReader/StreamWriter: