Sound architecture and design

Bad code can be avoided through the use of a good development architecture and design strategy. This will ensure that development teams and organizations have a high-level architecture, strategy, practices, guidelines, and governance plans that team members must follow to prevent cutting corners and avoiding bad code throughout the development process.

Through continuous learning and improvement, software development team members can develop thick skins towards writing bad code. The sample code snippet in the Bad or broken designs section can be refactored to be thread-safe and avoid thread-related issues, as shown in the following code:

public class SMTPGateway
{
    private static SMTPGateway smtpGateway=null;
    private static object lockObject= new object();

    private SMTPGateway()
    {
    }

    public static SMTPGateway SMTPGatewayObject
    {
        get
        {
            lock (lockObject)
            {
                if (smtpGateway==null)
                {
                    smtpGateway = new SMTPGateway();
                }
            }
            return smtpGateway;
        }
    }
}