Hello sir, I have doubt in Try It Out: Styling the Planet Wrox Home Page in Pg no.77, chapter3.In this, Styles.css consists of
1.heading---Type Selector
2.*---Universal Selector
3.h1---Type Selector
4.#PageWrapper---Id Selector
5.nav---Type Selector
6.Section#MainContent---Id Selector
7.aside---Type Selector
8.footer---Type Selector

Questions:
1.Why can't we use all Selector(except Universal Selector) as a Type Selector?
2.we give id for aside tag in markup but we used just Type Selector in CSS?
3.Why we use Section#MainContent instead of just #MainContent(as Id Selector)?
4.I don't understand the usage of Id Selector Beyond the other three Selector?
Thanks In Advance.

Hi there,

I don't understand any of your questions except for this one:

3.Why we use Section#MainContent instead of just #MainContent(as Id Selector)?

Either would work. What I like about the first solution is that it applies to a section element. This makes it easier to understand where it is applied in the HTML.

Cheers,

Imar

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Imar Spaanjaars
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Author of Beginning ASP.NET 4.5 : in C# and VB, Beginning ASP.NET Web Pages with WebMatrix
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