Advantage of var keyword in C# 3.0 [duplicate]

Answer 1

Here are a couple of advantages

1. Less typing with no loss of functionality
2. Increases the type safety of your code. A foreach loop using an iteration variable which is typed to var will catch silently casts that are introduced with explicit types
3. Makes it so you don't have to write the same name twice in a variable declaration.
4. Some features, such as declaring a strongly typed anonymous type local variable, require the use of var

Shameless self promotion. I wrote a blog entry on this subject awhile back that dived into when I thought the use of var was appropriate and contains relative information to this topic.

• http://beta.blogs.msdn.com/jaredpar/archive/2008/09/09/when-to-use-type-inference.aspx