public void SetActiveControl(object item)
        {
            object view = null;

            switch (item.ToString())
            {
            case "Dashboard":
                view = new Dashboard(this);
                break;

            case "Task":
                view = new TaskControl(this);
                break;

            case "TaskStatus":
                view = new TaskStatus(this);
                break;

            case "TaskType":
                view = new TaskType(this);
                break;

            case "TaskCategory":
                view = new TaskCategory(this);
                break;

            case "Sheet":
                view = new Sheet(this);
                break;

            case "Document":
                view = new Document(this);
                break;

            case "Contractor":
                view = new Contractor(this);
                break;

            case "ProjectContractor":
                view = new ProjectContractor(this);
                break;

            case "Supplier":
                view = new Supplier(this);
                break;

            case "ProjectSupplier":
                view = new ProjectSupplier(this);
                break;

            case "Customer":
                view = new Customer(this);
                break;

            case "Unit":
                view = new Unit(this);
                break;

            case "Material":
                view = new Material(this);
                break;

            case "SalesEnquiry":
                view = new SalesEnquiry(this);
                break;

            case "Firm":
                view = new Firm(this);
                break;

            case "Project":
                view = new Project(this);
                break;

            case "ProjectStatus":
                view = new ProjectStatus(this);
                break;

            case "ProjectType":
                view = new ProjectType(this);
                break;

            case "SiteManager":
                view = new SiteManager(this);
                break;

            case "Team":
                view = new Team(this);
                break;

            case "Quotation":
                view = new Quotation(this);
                break;

            case "Masters":
                view = new Masters(this);
                break;

            case "Settings":
                view = new Settings(this);
                break;

            case "PaymentMode":
                view = new PaymentMode(this);
                break;

            default:
                view = new Dashboard(this);
                break;
            }
            Container.Content = view;
        }