probleme PayPalAPIAASoapBinding namespace

Bonjour,

je veux utiliser la classe "PayPalAPIAASoapBinding" dans mon projet pour paiement en ligne, alors voici mon code :

Code:

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using System;
using System.Configuration;
using System.Collections.Generic;
using System.Linq;
using System.Text;
 
//Add this Lines :
using System.Security;
using System.Web;
using System.Web.Services;
using carola.Common;
using carola.Opeational.PayPalAPI.Sandbox;
 
using System.IO;
using System.Security.Cryptography.X509Certificates;
 
//This class is for paypal process payment, and use of paypal web service.
 
namespace carola.Opeational
{
    public class PayPalManager
    {
        private PayPalAPIAASoapBinding PPInterface = new PayPalAPIAASoapBinding();
        private PayPalAPISoapBinding service = new PayPalAPISoapBinding();
 
        public PayPalManager()
            {
                UserIdPasswordType user = new UserIdPasswordType();
                user.Username = ConfigurationManager.AppSettings["PayPalAPIUsername"];
                user.Password = ConfigurationManager.AppSettings["PayPalAPIPassword"];
            }
    }
}

L'erreur : la classe PayPalAPIAASoapBinding manque namespace ou reference mais j'ai tous ajouté.

Merci.