Justin Cooney

Web Development Tips and Examples

recent posts

about

I am a Senior Applications Programmer / Analyst with years of experience developing enterprise solutions using the Microsoft technology stack including C#, VB.NET, ASP.NET, AJAX, IIS and SQL Server. I specialize in Web application development with a focus on building secure systems, integrating applications, and designing robust database structures.

Author: Justin Cooney

  • IIS URL Rewrite – How to Remap Shortname to FQDN

    Problems can happen if users enter a Shortname for a site URL instead of the FQDN (Fully Qualified Domain Name). For example if a user types the URL as http://abc instead of http://abc.example.com, then the site certificate can come back as invalid, resulting as an error message or login prompt for the end user. Better…

  • Ubuntu Linux – Debugging the Error: the list of sources could not be read

    After installing and quickly uninstalling some software on my Ubuntu machine I saw an error on each boot saying: linux the list of sources could not be read.  It also included the name that was causing the problem abc.list. In my case it was a file called waydroid.list that was causing the trouble after I had…

  • C# Getting the Prior Month Start and End Dates with the Correct Times

    It seems like a simple task, but can end up being a bit tricky depending on how you write your code. I’ve seen a lot of examples of getting the start date and end date for a month but a lot of them are inaccurate or even incomplete and fail to take certain situations into account.…