https://getbootstrap.com/docs/5.1/exa... (Download Example)
1- Create _UserLayout.cshtml
2- Copy code from _Layout and paste it to _UserLayout.cshtml
3- Delete header tag and footer tag
4- Choose your navbar (navbar-static) and footer (footer) from bootstrap example to put code in _userLayout.cshtml
5- make _userLayout as default layout from _viewStart to test your design