从.NET中的字符串中获取url参数

string url = "https://example.com/?param1=value1&param2=value2";
string queryString = url.Split('?')[1];

var queryParams = HttpUtility.ParseQueryString(queryString);

string param1 = queryParams["param1"];
string param2 = queryParams["param2"];

string url = "https://example.com/?param1=value1&param2=value2";

string pattern = @"(?<=\?|&)([^=&]*)=([^=&]*)";

var matches = Regex.Matches(url, pattern);

Dictionary<string, string> queryParams = new Dictionary<string, string>();

foreach (Match match in matches)
{
    queryParams[match.Groups[1].Value] = match.Groups[2].Value;
}

string param1 = queryParams["param1"];
string param2 = queryParams["param2"];