public static async Task <Employee> GetEmployee(int id)
        {
            string sql = "SELECT * FROM Employee WHERE Id = @id";

            SqlCeCommand command = new SqlCeCommand(sql, con);

            command.Parameters.Add("@id", id);

            await con.OpenAsync();

            SqlCeDataReader result = (SqlCeDataReader)await command.ExecuteReaderAsync();

            Employee employee = new Employee();

            while (await result.ReadAsync())
            {
                employee.Id           = result.GetInt32(0);
                employee.Name         = result.GetString(1);
                employee.Email        = result.GetString(2);
                employee.Salary       = result.GetDecimal(3);
                employee.Gender       = result.GetString(4);
                employee.ContractType = result.GetString(5);
                //employee.RegisterDate = result.GetDateTime(6);
            }

            con.Close();

            return(employee);
        }