ASP.NET is a programming language created in 2002.

• ASP.NET Wikipedia page
• There are at least 21,976 ASP.NET repos on GitHub
• ASP.NET first developed in Microsoft
• file extensions for ASP.NET include asax, ascx, ashx, asmx, aspx and axd
• The Google BigQuery Public Dataset GitHub snapshot shows 463 users using ASP.NET in 543 repos on GitHub