其中哪个"C#实验语言功能"这是? [英] Which "C# Experimental language feature" is this?

问题描述

在下面的示例中，Resharper在第一个花括号上显示了"C#实验语言功能"工具提示.我检查了C#6.0的新功能，但没有遇到类似的功能.所谓的实验功能是什么?

In the example below, Resharper shows "C# Experimental language feature" tooltip on the first curly bracket. I've checked the new features of C# 6.0 but didn't come across a similar one. What is the referred experimental feature?

 class Class1
 {
     { // <= C# Experimental language feature
     }
 }

注意:.Net Framework 4.5编译器错误.

Note: It is an error for .Net Framework 4.5 compiler.

类，结构或接口成员声明中的无效令牌'{'"

"Invalid token '{' in class, struct, or interface member declaration"

推荐答案

此是，用于剪切.

This was for Primary Constructors, a feature which has now been cut from C#6.

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