Web Development

System.IO.FileNotFoundException: 'Could not load file or assembly 'System.Data.Linq, Version=4.0.0.0, Culture=neutral, PublicKeyToken=b77a5c561934e089'. The system cannot find the file specified.'

There is a problem with this website’s security certificate.
The security certificate presented by this website was issued for a different website's address. 

Javax.Net.Ssl.SSLHandshakeException: 
'java.security.cert.CertPathValidatorException: Trust anchor for certification path not found.'

public class _ApiControllerBase : ApiController
{
    private string connectionString;

    public IBizLayer BL { get; set; }

    public _ApiControllerBase()
    {
        connectionString = Properties.Settings.Default.ConnectionString;
        BL = new BizLayer(connectionString);
    }
}

public class JobsController : _ApiControllerBase
{
    public int AddJob([FromBody] JobEntity entity)
    {
        var newJobId = BL.AddJob(entity);
        return newJobId;
    }

    public void DeleteJob(int jobId)
    {
        BL.DeleteJob(jobId);
    }

    public IEnumerable GetAllJobs()
    {
        List results = new List();
        results = BL.GetJobsForProject(278).ToList();

        return results;
    }

    public JobEntity GetJob(int Job)
    {
        return BL.GetJob(Job);
    }

    public List GetJobsForProject(int projectId)
    {
        List results = new List();
        results = BL.GetJobsForProject(projectId).ToList();

        return results;
    }

    public void UpdateJob([FromBody] JobEntity entity)
    {
        BL.UpdateJob(entity);
    }
}

public static class WebApiConfig
{
    public static void Register(HttpConfiguration config)
    {
        config.MapHttpAttributeRoutes();

        config.Routes.MapHttpRoute(
            name: "DefaultApi",
            routeTemplate: "api/{controller}/{action}/{id}",
            defaults: new { id = RouteParameter.Optional }
        );
    }
}