Certain locations require you to write your software to be Web Accessible. That is, written in such a way so that certain people with disabilities can view your screen.

You need to review the requirements, and adjust your code accordingly. However there are tools that will check your code to see if there are any immediate concerns.

There’s quite a few tools available to the Visual Studio looking to avoid expenses.

Visual Studio - There is a tool called “Check Accessibility”. When you activate this and press validate, it will perform a test by looking at your code of whatever project you are working on and place it’s results in an output view.

Web Accessibility Checker - this is a website that contains a web accessiblity checker as well. The primary difference between this and the Visual Studio checker, is that it is looking at the HTML rather than your source code. Subsequently it comes up with a different set of errors than you would see on the Visual Studio tool.