Question

I’ve been reading Jon Skeet’s C# In Depth: Second Edition and I noticed something slightly different in one of his examples from something I do myself.

He has something similar to the following:

var item = someObject.Where(user => user.Id == Id).Single();

Whereas I’ve been doing the following:

var item = someObject.Single(user => user.Id == Id);

Is there any real difference between the two? I know Jon Skeet is pretty much the c# god so I tend to think his knowledge in this area is better than mine so I might be misunderstanding something here. Hope someone can help.

Answer 1

The queries should be equal when the tree is evaluated, however depending on the target the actual execution could differ (IE L2S optimization).