Summary  
This chapter explains how to read files using methods that load all text or lines at once and how to employ a stream reader for partial, line-by-line reading to parse and aggregate file data.

General domain of usage  
Processing student records

### Recap:
- `File.ReadAllText(filePath)` method returns all the content of a file in string form. It is useful when we want to retrieve all the text of a file;
- `File.ReadAllLines(filePath)` method returns all the content of a file in the form of an array of strings. It is useful when we want to retrieve all the text of a file already organized into an array based on lines;
- `StreamReader` object can be used for loading and reading a file line by line. It is useful when we want to read a file partially.


How does `StreamReader` contribute to file reading in C#?

What is the purpose of `File.ReadAllLines` in C#?

What does File.ReadAllText do in C# file handling?

This course will give you a solid foundation to begin making applications using .NET in C#. Covering console applications, asynchronous programming, web services, database fundamentals, and ADO.NET CRUD operations, you'll gain practical skills. From creating apps and handling exceptions to optimizing database access, this course ensures a robust understanding of essential .NET development concepts.

In this section we will learn about what is .NET, how to setup the development environment and how to start making some console apps. Apart from that we will also learn how to take input from the user in the console for making interactive applications.

In this section, we will be learning how to perform multiple tasks at once to improve the performance and responsiveness of applications. We will also briefly learn what Web Services and APIs are. This will give us an introduction to how the internet and websites work. We will also learn how to use APIs.

In this section we will learn what are databases, specifically what are SQL databases and how to create them. We will study their structure and will learn to perform some basic operations on the databases. This chapter will serve as an introduction to ADO.NET which is a .NET module used for interacting with databases.

In this section, we'll cover the fundamental CRUD operations (Create, Read, Update, Delete) using SQL. We'll explore SQL syntax at a basic level and recap how to implement each SQL statement in C# code. While some parts may serve as a review from the previous section, this will provide a solid understanding of essential database concepts, enabling you to understand both the SQL and C# code and write it independently.

In this chapter we will learn about additional functions or methods for making database management more efficient. For-example executing multiple SQL commands at once using Stored Procedures, and retrieving data in bulk from the SQL database using DataSet.

Reading Files

Recap:

1. How does `StreamReader` contribute to file reading in C#?

2. What is the purpose of `File.ReadAllLines` in C#?

3. What does File.ReadAllText do in C# file handling?

Reading Files

Recap:

1. How does StreamReader contribute to file reading in C#?

2. What is the purpose of File.ReadAllLines in C#?

3. What does File.ReadAllText do in C# file handling?

1. How does `StreamReader` contribute to file reading in C#?

2. What is the purpose of `File.ReadAllLines` in C#?