在Asp.Net 2.0中使用什么代替“ var”

Question

I'm craeting 2 dependent drop down menus. So I used the code in this link's solution: Dynamically add drop down lists and remember them through postbacks

But I guess the problem is that var usage belongs to 3.5. So Visual Studio doesn't recognize it. So what can I use instead of var in this line?

var items = new List<ListItem>();

Answer 1

只是使用要创建的对象的类型？

List<ListItem> items = new List<ListItem>();

Answer 2

The var keyword was introduced in C# 3.0. It declares an implicitly typed variable where the compiler infers the type of the variable. It is a convenience but if you don't want to use it (or cannot use it in older versions of C#) you can declare the variable using an explicit type instead.

In your case you have to do it like this:

List<ListItem> items = new List<ListItem>();

You can read more about implicitly typed local variables on MSDN.