How can I spot why the CSS not working in Razor View (model)?

Question

I have build an web application, and I want to delete some record in the database using ASP.NET MVC. But, in the delete Razor View, the CSS is not working, so the page is like this 1 . This is the Delete Page of my application 2 . I wonder if there are any solutions for this problem. Thank you in advance.

Answer 1

Check this document describe col-sm , and as i notice the CSS classes that you have been used were marked with red, so maybe the version of bootstrap doesn't contain those classes.

the reference:https://www.w3schools.com/bootstrap/bootstrap_grid_examples.asp