Pivot function in SQL Server

 https://www.selectdistinct.co.uk/2023/05/22/pivot-function-in-sql/

Struct vs class

 https://www.geeksforgeeks.org/c-sharp-structures-set-1/

Types in C#

 https://learn.microsoft.com/en-us/dotnet/csharp/language-reference/language-specification/types#81-general

Advanced C# and ASP.NET - Introduction to R language - XHTML VS HTML

 https://www.javatpoint.com/c-sharp-thread-synchronization

https://www.javatpoint.com/r-tutorial

 https://www.javatpoint.com/html-vs-xhtml

https://www.geeksforgeeks.org/difference-between-xhtml-and-html5/

How to get URL of Current Page in asp.net

 Request.URL.AbsoluteURL