How to keep single SQL Server connection instance open for multiple request in C#?

Question

I have a Web API which contains database insert logic (ado.net) in C#. When multiple users (e.g. 100 users) call the Web API, every time a SQL Server connection is opened an

Answer 1

Well it's easy you just have to keep the connection open and if any readers opened they are closed.

var con = new SqlConnection("Your connection String");
   con.open();
   //your code
con.close()//after you have done your executions

Have you tried Linq. It does the same thing you want, it keeps the connection alive and i think it'll be easier for you