Display certificate in an asp form(digital signature)

Hi everyone,

i want to display on a web form my certificate.Is it possible? and how ?or something else?

my project consist of a purchase order that need to be digitaly sign with a certificate 

i'm sorry for mistake(s) but i come from belgium  ^^ 

with that code :
 X509Store store = new X509Store(StoreLocation.CurrentUser);

            store.Open(OpenFlags.ReadOnly);
            X509CertificateCollection certificates =
    X509Certificate2UI.SelectFromCollection
    (
    store.Certificates,
    "Liste des certificats",
    "Veuillez sélectionner un certificat",
    X509SelectionFlag.SingleSelection
    );
            X509Certificate2 certificate = null;
            if (certificates.Count != 0)
            {
                certificate = (X509Certificate2)certificates[0];
            }
            /*afficher tout
             foreach (X509Certificate2 cert in store.Certificates)
              {
                  Console.WriteLine(string.Format("Délivré à {0} par {1}",cert.SubjectName.Name, cert.IssuerName.Name));

              }*/

            Console.WriteLine(string.Format("Délivré à {0} par {1}", certificate.SubjectName.Name, certificate.IssuerName.Name));


            store.Close();

            XmlDocument xmlDoc = new XmlDocument();
            xmlDoc.PreserveWhitespace = true;
            xmlDoc.Load("article.xml");
            SignedXml signedXml = new SignedXml(xmlDoc);
            signedXml.SigningKey = certificate.PrivateKey;
            KeyInfo keyInfo = new KeyInfo();
            keyInfo.AddClause(new KeyInfoX509Data(certificate));
            signedXml.KeyInfo = keyInfo;
            Reference reference = new Reference();
            reference.Uri = "";
            reference.AddTransform(new XmlDsigEnvelopedSignatureTransform());
            signedXml.AddReference(reference);
            signedXml.ComputeSignature();
            XmlElement signature = signedXml.GetXml();
            xmlDoc.DocumentElement.AppendChild(xmlDoc.ImportNode(signature, true));
            xmlDoc.Save("envelopeds.xml");

            XmlDocument xmlDoc2 = new XmlDocument();
            xmlDoc2.PreserveWhitespace = true;
            xmlDoc2.Load("envelopeds.xml");
            SignedXml signedXml2 = new SignedXml(xmlDoc2);
            XmlNodeList nodeList = xmlDoc2.GetElementsByTagName("Signature");
            signedXml2.LoadXml((XmlElement)nodeList[0]);
            bool valid = signedXml2.CheckSignature();
            if (valid == true)
            {
                Console.WriteLine("not changed");
                textBox3.Text = certificate.ToString(true);
                textBox4.Text = DateTime.Now.ToString();
              //  pictureBox1.Load(certificate.ToString());
            }
            else
            {
                Console.WriteLine("bad :(");

            }

thanks a lot :)