Unsolved: Asp.Net Core Server hangs SQL Server and Application Pool. Restart Application Pool SQL

this is an undocumented problem of the Asp.Net Core 2 running on IIS Webserver Windows Server, where the SQL Server Database gets problems or hangs and causes the application pool to problems.
Solving actual: stop and start immediatly the
C# .Net WPF UWP WinUI SQL Server Access Excel vba ++
Freelancer

[@jannieboshoff5185]

So I have the issue where my ASP.Net Web Forms Application does not respond, my Application Pool does not respond if I do a lot of DB call after one another, then I have to recycle the Application Pool , give it a few seconds and then it works again...I am so confused as to where the issue is. I doubt it's the Application Pool itself because I've created new default Application pools and it still does not work, so its either between my ASP.Net App or SQL Server Express thats causing this...