// This method creates a WSFederationHttpBinding.
public static WSFederationHttpBinding 
    CreateWSFederationHttpBinding(bool isClient)
{
  // Create an instance of the WSFederationHttpBinding.
  WSFederationHttpBinding b = new WSFederationHttpBinding();

  // Set the security mode to Message.
  b.Security.Mode = WSFederationHttpSecurityMode.Message;
  
  // Set the Algorithm Suite to Basic256Rsa15.
  b.Security.Message.AlgorithmSuite = SecurityAlgorithmSuite.Basic256Rsa15;

  // Set NegotiateServiceCredential to true.
  b.Security.Message.NegotiateServiceCredential = true;

  // Set IssuedKeyType to Symmetric.
  b.Security.Message.IssuedKeyType = SecurityKeyType.SymmetricKey;

  // Set IssuedTokenType to SAML 1.1
  b.Security.Message.IssuedTokenType = 
      "http://docs.oasis-open.org/wss/oasis-wss-saml-token-profile-1.1#samlv1.1";

  // Extract the STS certificate from the certificate store.
  X509Store store = new X509Store(StoreName.TrustedPeople, StoreLocation.CurrentUser);
  store.Open(OpenFlags.ReadOnly);
  X509Certificate2Collection certs = store.Certificates.Find(
      X509FindType.FindByThumbprint, "0000000000000000000000000000000000000000", false);
  store.Close();
  
  // Create an EndpointIdentity from the STS certificate.
  EndpointIdentity identity = EndpointIdentity.CreateX509CertificateIdentity ( certs[0] );
  
  // Set the IssuerAddress using the address of the STS and the previously created 
  // EndpointIdentity.
  b.Security.Message.IssuerAddress = 
      new EndpointAddress(new Uri("http://localhost:8000/sts/x509"), identity);