public static void СhangePolicyInDataBase(InsurancePolicy policy)
 {
     using (InsurancePolicyContext dataBase = new InsurancePolicyContext())
     {
         dataBase.Update(policy);
         dataBase.SaveChanges();
     }
 }
        public static void AddPolicyToDataBase(InsurancePolicy policy)
        {
            using (InsurancePolicyContext dataBase = new InsurancePolicyContext())
            {
                policy.Id             = Guid.NewGuid().ToString();
                policy.DateOfCreation = DateTime.UtcNow;

                dataBase.InsurancePolicy.Add(policy);
                dataBase.InsurancePolicy.Add(policy);
                dataBase.SaveChanges();
            }
        }