c# HttpClient

以下是两个使用C# HttpClient的例子：

1. 使用GET方法获取指定URL的内容：

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

namespace HttpClientEx
{
    class Program
    {
        static async Task Main(string[] args)
        {
            using var client = new HttpClient();
            var content = await client.GetStringAsync("http://webcode.me");
            Console.WriteLine(content);
        }
    }
}

2. 使用HEAD方法获取指定URL的响应头：

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

namespace HttpClientHead
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var url = "http://webcode.me";
            using var client = new HttpClient();
            var result = await client.SendAsync(new HttpRequestMessage(HttpMethod.Head, url));
            Console.WriteLine(result);
        }
    }
}