/// <summary>
/// 解密字符串 密钥为系统默认
/// </summary>
/// <param name="inputStr">要解密的字符串</param>
/// <returns>解密后的结果</returns>
public static string SDecryptString(string inputStr)
{
YtSecurity ws = new YtSecurity();
return ws.DecryptString(inputStr, "");
}