如何使用C#向REST api添加参数？

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

HttpClient client = new HttpClient();

string apiUrl = "https://api.example.com/endpoint";
string parameter1 = "value1";
string parameter2 = "value2";

string urlWithParameters = $"{apiUrl}?param1={parameter1}&param2={parameter2}";

HttpResponseMessage response = await client.GetAsync(urlWithParameters);

if (response.IsSuccessStatusCode)
{
    string responseData = await response.Content.ReadAsStringAsync();
    // 处理响应数据
}
else
{
    Console.WriteLine("请求失败，状态码：" + response.StatusCode);
}

string apiUrl = "https://api.example.com/endpoint";
string parameter1 = "value1";
string parameter2 = "value2";

Dictionary<string, string> parameters = new Dictionary<string, string>
{
    { "param1", parameter1 },
    { "param2", parameter2 }
};

HttpContent content = new FormUrlEncodedContent(parameters);

HttpResponseMessage response = await client.PostAsync(apiUrl, content);

// 处理响应...