Gain insights into C# 10 and .NET, learn programming basics, delve into OOP, explore data structures, and discover how to build and deploy native applications effectively.

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C# is one of the most popular programming languages in the world, and its latest stable version, C# 10, has several new features and updates that make it an excellent choice for a wide variety of applications. Combined with the .NET framework, C# can empower developers to build native applications for all the major consumer operating systems as well as the cloud.

The course starts with an introduction to programming concepts such as conditional statements, loops, arrays, and functions. You’ll explore advanced topics of object-oriented programming (OOP) including classes, inheritance, access, and extensions. Finally, you’ll work with data structures, events, concurrency, testing, and databases.

By the end of this course, you’ll have a working knowledge of not only the C# programming language, but also key ideas of software engineering. You’ll also be prepared to build and deploy native applications with the .NET framework.

Programming Fundamentals: Getting Started with C# and .NET

# How to read and write text files?

Variables are temporary; once the program is turned off, the data is lost. **Writing and Reading** to a text file is a permanent way to handle data that needs to be saved when the program is turned off.

The ```StreamWriter``` class writes to text files. This class is contained in the ```System.IO``` namespace. To use this class, include the following at the top of the page.

```C#
using System.IO; // C# 10 comes with ImplicitUsings, meaning the most popular using namespaces such as this one are already built-in so there is no need to declare it
```

Let's learn how to read and write text files.

Introduction

C# Basics

Operators

Decisional Statements

Loops (Iterative Statements)

Arrays

Methods

Classes

Data Structures

Delegates and Events

Miscellaneous Topics

Concurrency

LINQ and Databases

Appendix

Writing/Reading Text Files

How to read and write text files?