/// <summary>
/// 验签
/// </summary>
/// <returns>是否为真实值</returns>
private bool Verify()
{
StringBuilder sb = new StringBuilder();
string sign = "";
bool b = false;
foreach (var(k, v) in jo)
{
if (k.Equals("sign"))
{
sign = v.ToString();
continue;
}
if (b)
{
sb.Append("&");
}
sb.Append($"{k}={v}");
b = true;
}
return(RSA.AllinpayVerify(sb.ToString(), sign));
}