I've just started using ReSharper with Visual Studio (after the many recommendations on SO). To try it out I opened up a recent ASP.NET MVC project. One of the first and most frequent things I've noticed it suggesting is to change most/all my explicit declarations to var instead. For example:

//From This:
MyObject foo = DB.MyObjects.SingleOrDefault(w => w.Id == 1);
//To This:
var foo = DB.MyObjects.SingleOrDefault(w => w.Id == 1);

等，即使是简单的类型，如 INT ，布尔等。

这是为什么被推荐？我不来自计算机科学或.NET的背景下，具有陷入.NET开发最近，所以我真的很想知道发生了什么，以及是否是有益与否。

Why is this being recommended? I don't come from a computer science or .NET background, having "fallen into" .NET development recently, so I'd really like to understand what's going on and whether it's of benefit or not.

推荐答案

原因之一是提高可读性。哪个更好呢？

One reason is improved readability. Which is better?

Dictionary<int, MyLongNamedObject> dictionary = new Dictionary<int, MyLongNamedObject>();

或

var dictionary = new Dictionary<int, MyLongNamedObject>();