With the master page defined, we're ready to add the ASP.NET pages for the website. Let's start by adding Default.aspx, our website's homepage. Right-click on the project name in the Solution Explorer ...

Click Create. In the “Create a New ASP.NET Core Web Application” window shown next, select .NET Core as the runtime and ASP.NET Core 3.1 (or later) from the drop-down list at the top.