// TODO: Create methods containing your application logic.
[EnableClientAccess()]
public class DomainService1 : DomainService
{

    LicensedClass validation = new LicensedClass();

    [Invoke]
    public string licenseValidation()
    {


        return validation.Validation();

    }


    [Invoke]
    public string licenseInformation()
    {

        return validation.LicFile();


    }

}

public partial class MainPage : UserControl
{
   DomainService1 domain = new DomainService1();
    public MainPage()
    {
        InitializeComponent();
    }
    public void CheckText() {
        InvokeOperation<string> operation3 = domain.licenseInformation();
        operation3.Completed += (x, y) =>
        {
            if (!operation3.HasError)
            { textBox2.Text = operation3.Value; }
            else { textBox1.Text = "error"; }


        };




    }