public void SetTestTreeItemActivity(int nodeId, bool isActive)
{
Provider.TestRoles(TestorUserRole.Administrator, TestorUserRole.Teacher, TestorUserRole.Laboratorian);
using (DataClassesTestorCoreDataContext dataContext = new DataClassesTestorCoreDataContext(TestorSecurityProvider.ConnectionString))
{
dataContext.SetTestTreeItemActivity(nodeId, isActive);
dataContext.SubmitChanges();
}
}