Help How to use class as Log as method in c#?

[shion_]

 user.Add(new Account()

            {
                AccountsNumber = "000001",
                AccountPin = "123456",
                Lastname = "bayola",
                Firstname = "wally",
                AccountBalance = "55000"
            });

            user.Add(new Account()
            {
                AccountsNumber = "000002",
                AccountPin = "654321",
                Lastname = "revilla",
                Firstname = "bong",
                AccountBalance = "1055000"
            });


            user.Add(new Account()
            {
                AccountsNumber = "000003",
                AccountPin = "789123",
                Lastname = "manalo",
                Firstname = "jose",
                AccountBalance = "1000000"
            });



        }