/// <summary>
/// 获取签名字符串
/// </summary>
/// <param name="appSecret"></param>
/// <param name="timestamp"></param>
/// <param name="nonce"></param>
/// <returns></returns>
static string SignatureString(string appSecret, string timestamp, string nonce)
{
string[] ArrTmp = { appSecret, timestamp, nonce };
Array.Sort(ArrTmp);
string tmpStr = string.Join("", ArrTmp);
tmpStr = HashAlgorithmProvider.ComputeHash("SHA1", tmpStr, true);
return(tmpStr.ToLower());
}
