April 2013
Intermediate to advanced
1700 pages
92h 51m
English
Content preview from C# 5.0 UnleashedBecome an O’Reilly member and get unlimited access to this title plus top books and audiobooks from O’Reilly and nearly 200 top publishers, thousands of courses curated by job role, 150+ live events each month,
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InvalidCastException
Being able to cast an object to an incompatible type would lead to a breach in the type safety of the system, which clearly is to be avoided. InvalidCastException is the CLR’s way to block every such attempt.
Nowadays, after the introduction of generic types, the use of casts should have become much rarer than it used to be. Every time you have to cast an object to a more specific type, ask yourself how you ended up in this situation in the first place. Maybe it has something to do with generics. And if you find yourself performing a type-based switch using is or as, perhaps using object-oriented virtual dispatch facilities is more appropriate.
Either way, if you do a cast, you had better darn well know what the target type ...
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O’Reilly covers everything we've got, with content to help us build a world-class technology community, upgrade the capabilities and competencies of our teams, and improve overall team performance as well as their engagement.Julian F.
I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
I’ve been on the O’Reilly platform for more than eight years. I use a couple of learning platforms, but I'm on O'Reilly more than anybody else. When you're there, you start learning. I'm never disappointed.Amir M.
I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.