MVC _layout file

Abhishek Ghosh

I see the same thought everywhere but can't understand why it is so. Please can anyone help me understand.

In ASP.NET MVC, pay a lot of attention to keeping the layout file as thin as possible. This means that you should avoid referencing from the layout file CSS and script files that are referenced by all pages based on the layout. As developers, we certainly find it easier and quicker to reference resources used by most pages right from the layout file. But that only produces extra traffic and extra latency.

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Abhishek Ghosh9y ago
I understand how _layout behaves as masterpge but my questions is how does it produce extra traffic and extra latency when we use common css and script files in _layout file.
Manas Mohapatra9y ago
_layout.cshtml file pesent in Views/Shared/ folder means it is shared component. It is mostly for maintain consistent look in application just like Mater page in WebForms. It is referenced in _ViewStart.cshtml file inside Views folder. Follow below links that may help you to undersand more:

http://www.c-sharpcorner.com/blogs/layouts-and-viewstartcshtml-in-mvc

http://www.dotnettricks.com/learn/mvc/different-ways-of-rendering-layouts-in-aspnet-mvc