How to use returned linq variable?

Question

I\'ve decided to take a quick look into the LINQ side of things, as opposed to just using a straight up foreach loop, but i\'m having some trouble getting it to work, mainly

Answer 1

Shane,

I'm not going to improve on the previous answers. They were both correct. I am going to try and explain a little bit to you, so that you understand it in the future a bit better.

What happens, when you write a piece of code like:

var selectedSiteType = from sites in siteTypeList
                               where sites.SiteTypeID == temp
                               select sites;

you don't put the answer into the var (selectedSiteType), instead, you are creating an expression tree, that is evaluated ONLY when you actually use it (in a foreach, or by calling one of the methods (like .First(), .ToList(), SingleOrDefault(), etc).

The default return type of a from statement, is an IEnumerable<>, but if you call the .First() or .SingleOrDefault() (etc), you will dive into that IEnumerable<> and get a specific item.

I hope this helps you better understand what is going on.

Lemme know if I can add anything or if I got anything wrong.

Cheers,

Max