public void Test_Const()
        {
            var sqlExcep = new SqlOperationException();

            Assert.IsNotNull(sqlExcep);
            Assert.IsTrue(sqlExcep.ToString().Contains("Unknown database exception"));
        }
        public void Test_InnerExeption()
        {
            var baseException = new Exception("base exception", new ArgumentException());

            var sqlExcep = new SqlOperationException("sql exception", baseException);

            Assert.IsNotNull(sqlExcep);
            Assert.IsTrue(sqlExcep.ToString().Contains("sql exception"));
        }