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Below you can find the list of all features introduced in C# 7. Tuples Deconstruction Out variables Patterns Discards Literal improvements Local functions Expression-bodied members Throw Expressions Ref returns and ref locals Generalized async return types

All C# 7.0 features

Returning reference instead of value might be very useful – especially when one has to deal with big structures. C# allows passing parameters by reference, but a method was not able to return a reference. This has been changed with C# version 7.0.

C# 7.0 – Ref returns and ref locals

Some time ago, I showed a way to avoid deadlocks when reading the redirected console of a child process in a synchronous way. It works, but only when we have to deal with a single output stream – standard output or standard error stream. But what should be done when both streams are flooded with data?

How to avoid deadlocks when reading redirected child console in C# (part 2)

C# 7.0 - Throw Expressions
Before C# 7.0 it was not possible to throw an exception directly in expression-bodied members. The workaround was to call a method that throws an exception.

C# 7.0 – Throw Expressions

There are situations when one needs a small helper method, but it’s not quite obvious where to put it. The method might not be generic enough to expose it as a new entity or even as a class member.

C# 7.0 – Local functions

Sometimes there is a need to ignore a result of a method. It’s straightforward if that’s a return value – just don’t assign it. But what should be done in other cases?

C# 7.0 – Discards

The concept of patterns was introduced in C# 7.0. The idea is to check if an object reflects a specified shape.

C# 7.0 – Patterns