如何在C#中监控HttpWebRequest？

public class CustomHttpWebRequest : HttpWebRequest
{
    protected override WebRequest GetWebRequest(Uri uri)
    {
        var request = base.GetWebRequest(uri);
        
        // 添加监控逻辑
        
        return request;
    }
}

var request = (HttpWebRequest)WebRequest.Create("http://example.com");
request.Method = "GET";
request.Headers.Add("User-Agent", "MyCustomUserAgent");

// 发送请求
var response = (HttpWebResponse)request.GetResponse();

Console.WriteLine($"Sending request to {uri}");

var stopwatch = Stopwatch.StartNew();
var response = (HttpWebResponse)request.GetResponse();
stopwatch.Stop();
Console.WriteLine($"Request took {stopwatch.ElapsedMilliseconds} ms");

// 在类的静态字段中定义计数器
private static int requestCount = 0;

// 在GetWebRequest方法中增加计数逻辑
requestCount++;
Console.WriteLine($"Request count: {requestCount}");