Web API MVC Web Forms C#
Originally I started with Classic ASP. This evolved to using ASP.NET (C#) for Web Forms, MVC and Web API 2. I had coded in JSP(Java Server Pages) which helped pickup C#.
Further examples of how I have used this technology can be seen in the work section.
This site uses MVC .NET Core 3.1 .
I'm currently developing a canvas game to help children learn maths using ES6 and NPM.
HTML CSS Bootstrap
I develop responsive user interfaces which works across all modern browsers at all resolutions. In addition to using HTML5 or CSS3, I can also target legacy browsers too. This is useful when considering the WinForms Web Browser control is based on Internet Explorer 7.
I've plenty of experience with HTML and CSS. I often use Sassy Cascaded Style Sheets (SCSS) where appropriate.
Microsoft SQL Server
I've been using MS SQL Server since version 6.5 on Windows NT 4 Servers. Depending on your requirements, I can use LINQ or Stored Procedures.
This knowledge has been useful for MySQL development too.
Although the technologies shown above being most frequent ones I use, I have also developed in many legacy technologies too, such as Adobe Flash and Classic ASP. Despite their demise, the development principles involved are still relevant today.