what if i add same css file twice in my asp.net application

I am developing an ASP.NET application , in which my master page has one css file named "styles/xyz.css" now my one other aspx file is aslo adding the same css file "styles/xyz.css" which is using the master page now my question is how this two same css file will be treated ? the thing i wanted to know here is "how asp.net engine ( or css rendering engine ) will treat this two file ? " will it overwrite the previous css with the new one ? or it will load both the file in the memory ? or it will combine both the css file in one ?

as such there is no referencing error or conflict in 开发者_C百科my application but i would like to know about the efficiency and memory optimization ..

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Whichever one is referenced closer to the body tag (or content in question) will take priority when it comes to overriding similiar classes and IDs.

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it will not combine it, it will load it twice.

first it will load the css from the child page, then load it again from the masterpage.