如何将查询字符串解析为.NET中的NameValueCollection

string queryString = "key1=value1&key2=value2&key3=value3";
NameValueCollection queryParameters = HttpUtility.ParseQueryString(queryString);

// 获取键值对
string key1Value = queryParameters["key1"];
string key2Value = queryParameters["key2"];
string key3Value = queryParameters["key3"];

// 遍历所有键值对
foreach (string key in queryParameters.AllKeys)
{
    string value = queryParameters[key];
    // 处理键值对
}