Assuming Visual Studio 2019 is installed in your system, follow the steps outlined below to create a new ASP.Net Core project in Visual Studio.

Practical ASP.NET Create Data-Bound Controls With ASP.NET 2.0 ASP.NET 2.0 lets you build a data-bound custom control that ensures your data is always displayed consistently. By Peter Vogel 09/01/2005 ...

However, creating a separate .ASMX Web service file and adding the ScriptService attribute to the service class may feel like overkill in situations where a single page consumes the service's methods.