How can requests be sent using the HTTP protocol?

In C#, the HttpClient class is most commonly used for sending HTTP requests. The main methods of sending requests are:

• GET — retrieving data from the server.
• POST — sending data to the server.
• PUT — updating data.
• DELETE — deleting data.

Example of sending a GET request:

using System.Net.Http;
using System.Threading.Tasks;

HttpClient client = new HttpClient();
string url = "https://api.example.com/data";

HttpResponseMessage response = await client.GetAsync(url);
string responseBody = await response.Content.ReadAsStringAsync();

Console.WriteLine(responseBody);

For POST requests, you can use the PostAsync method, passing the content as HttpContent.