Problem with Login manager after upgrading from 5.x to 6.0.4

Hi

namespace NextStay.TallyIntegrator

//[DiscoverableType(DiscoverableTypeMode.KnownType)]

public class LoginManager : IEntityLoginManager

public IPrincipal Login(ILoginCredential credential, EntityManager entityManager)

// Disallow null credentials and throw a LoginException

if (credential == null)

throw new LoginException(LoginExceptionType.NoCredentials, "Loginoplysninger mangler");

//return error if loginmanager is null

if (entityManager == null)

throw new LoginException(LoginExceptionType.NoLoginManager, "Loginmanager findes ikke.");

var user = entityManager.GetQuery<User>().FirstOrDefault(u => u.Id == credential.UserName);

//user does not exist

if (user == null)

throw new LoginException(LoginExceptionType.InvalidUserName, "Bruger '" + credential.UserName + "' findes ikke.");

//wrong password

if (user.Password != credential.Password)

throw new LoginException(LoginExceptionType.InvalidPassword, "Forkert password.");

// types implementing IPrincipal.

GenericIdentity identity = new GenericIdentity(credential.UserName);

GenericPrincipal principal = new GenericPrincipal(identity, new string[] { });

return principal;

public void Logout(IPrincipal principal, EntityManager entityManager)

// No special processing needed.

The formatter threw an exception while

trying to deserialize the message: There was an error while trying to deserialize

parameter http://ideablade.com/EntityModehLoginResult. The InnerException

message was ‘Element ‘http:!fideablade.com/EntityModel:Principal’ contains data

of the

‘http://schemas.datacontract.org/2004/O7/System.Security.Principal:GenericPrinci

pal data contract. The deserializer has no knowledge of any type that maps to this

contract. Add the type corresponding to ‘GenericPrincipal’ to the list of known

types - for example, by using the KnownTypeAttribute attribute or by adding it to

the list of known types passed to DataContractSerializer.’. Please see

InnerException for more details.