public static string getCheckValue(string rootPath, string merchantId, string returnUrl, string paymentTypeObjId, string amtStr, string merTransId)
{
string xmlKey = File.ReadAllText(rootPath + "\\" + merchantId + ".xml");
RSAParameters PrvKeyInfo = RSAUtility.GetPrvKeyFromXmlString(xmlKey);
RSACng rsa = new RSACng();
rsa.ImportParameters(PrvKeyInfo);
string orgString = merchantId + merTransId + paymentTypeObjId + amtStr + returnUrl;
ASCIIEncoding byteConverter = new ASCIIEncoding();
byte[] orgData = byteConverter.GetBytes(orgString);
byte[] signedData = rsa.SignData(orgData, HashAlgorithmName.MD5, RSASignaturePadding.Pkcs1);
return(Convert.ToBase64String(signedData));
}
