What kind of proxy support does ScrapySharp offer?

ScrapySharp is a web scraping framework for .NET inspired by the Scrapy framework in Python. It is designed to provide a simple way to extract data from websites by using CSS selectors and LINQ.

ScrapySharp does not provide built-in proxy support in the same way that Scrapy in Python does. In Python's Scrapy, proxy settings can be defined in the settings file or by using middlewares. However, in ScrapySharp, you would have to manage proxies at the HttpClientHandler level since ScrapySharp generally uses HttpClient for making HTTP requests.

Here's a basic example of how you can use a proxy with HttpClientHandler which would be used alongside ScrapySharp:

using System;
using System.Net;
using System.Net.Http;
using ScrapySharp.Network;

class Program
{
    static void Main()
    {
        var proxy = new WebProxy
        {
            Address = new Uri($"http://{proxyIp}:{proxyPort}"),
            BypassProxyOnLocal = false,
            UseDefaultCredentials = false,

            // *** These credentials are given by the proxy service
            Credentials = new NetworkCredential(
                userName: proxyUsername,
                password: proxyPassword)
        };

        var httpClientHandler = new HttpClientHandler
        {
            Proxy = proxy,
        };

        var httpClient = new HttpClient(httpClientHandler);
        var webPage = new ScrapingBrowser
        {
            // Set the HttpClient instance
            HttpClient = httpClient
        };

        // Now you can use webPage to navigate and scrape as needed
        WebPage pageResult = webPage.NavigateToPage(new Uri("http://example.com"));
        Console.WriteLine(pageResult.Html);
    }
}

In this example, an HttpClientHandler is configured with a proxy, and then an instance of HttpClient is created using this handler. The HttpClient is then assigned to a ScrapingBrowser instance, which is the main class you use in ScrapySharp for web scraping.

Please note that you will need to replace proxyIp, proxyPort, proxyUsername, and proxyPassword with the actual details provided by your proxy service.

Also, keep in mind that this is a simplified example. In a production environment, you would want to handle errors, manage timeouts, and possibly rotate proxies if you're doing large-scale scraping to avoid IP bans.

If you're doing serious web scraping and require advanced features like built-in proxy support, middlewares for request processing, or other sophisticated mechanisms for handling requests, you might want to consider using a different toolkit or language that has more mature web scraping libraries, such as Scrapy in Python.