Late applying css on page

Question

The problem happen after moving ASP.NET from VS2010 to VS2017.

The problem is, while loading the page on browser, it flickers showing the content same as if css is not applied, and immediately apply it.

Screen shot while loading the page:

Screen shot after loading the page:

Answer 1

I have found the solution for my problem, the solution was to add the links of the css files before the links of the java scripts files in the head section of the page.