var in C# - Why can't it be used as a member variable? [duplicate]

问题

This question already has answers here:

Implicit typing; why just local variables? (6 answers)

Closed 5 years ago.

Why is it not possible to have implicitly-typed variables at a class level within C# for when these variables are immediately assigned?

ie:

public class TheClass
{
    private var aList = new List<string>();
}

Is it just something that hasn't been implemented or is there a conceptual/technical reason for why it hasn't been done?

回答1:

Here's a blog post from Eric that explains the reasoning.

来源：https://stackoverflow.com/questions/2771485/var-in-c-sharp-why-cant-it-be-used-as-a-member-variable