Описание тега c#-7.1

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Use this tag for questions specific to C# 7.1, released on 16 August 2017. In most cases you should also specify the C# tag.

C# 7.1 adds the ability to configure the compiler to match a specified version of the language. That enables you to separate the decision to upgrade tools from the decision to upgrade language versions.

C# 7.1 adds the language version selection configuration element, three new language features and new compiler behavior.

The new language features in this release are:

async Main method: the entry point for an application can have the async modifier.
default literal expressions: you can use default literal expressions in default value expressions when the target type can be inferred.
Inferred tuple element names: the names of tuple elements can be inferred from tuple initialization in many cases.

Finally, the compiler has two options /refout and /refonly that control reference assembly generation.

Full release notes are available here.