Summary  
This chapter explains how to manage resources and handle runtime exceptions in asynchronous operations by disposing of clients with a using statement, wrapping calls in try-catch blocks, and validating the outcome via success flags and status codes.

General domain of usage  
Consuming web APIs

### Important Points:
- Runtime errors can occur when making API requests. The most notable case is if the URL / URI provided is invalid;
- We use **try-catch blocks** to enclose the `GetAsync` method to make it safe;
- The `HttpResponseMessage` class has an `IsSuccessStatusCode` attribute, which has the value `true` in case the API successfully responds with the requested data;
- `HttpResponseMessage` also has a `StatusCode` attribute which represents the response status code. You can learn more about status codes <a 
href="https://en.wikipedia.org/wiki/List_of_HTTP_status_codes"
target="_blank"
style="color: #ff8a00; font-weight: 600; text-decoration: none; transition: 0.3s ease-in-out;"
onmouseover="this.style.color='#ff0000'"
onmouseout="this.style.color='#d27204'">here</a>;
- HTTP status codes are three-digit numbers returned by a server in response to a client's request made to a website or web server. They provide information about the outcome of the request and help troubleshoot issues.

What methods do we use to make an API request safer?

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.

Handling Exceptions caused by HTTP Request

Important Points: