Colorblinds people, however, still feel certain ranges of reds as bright and vivid colors. The color vision of some anomalous trichromacy people is as affected as a dichromacy people. These files are essential to all UWP apps using C#. Every project that you create in Visual Studio contains them. Although the Blank App (Universal Window) is a minimal template, it still contains a lot of files. Requirements If any of these requirements are missing you might need to contact your webhost and ask them to install or enable the needed extensions.