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C# Version 7.2

 
 
C# Version 7.2
 

Released November, 2017


C# 7.2 added several small language features:

⮚Initializers on

stackalloc

arrays.
⮚Use

fixed

statements with any type that supports a pattern.
⮚Access fixed fields without pinning.
⮚Reassign

ref

local variables.
⮚Declare

readonly

struct types, to indicate that a struct is immutable and should be passed as an

in

parameter to its member methods.
⮚Add the

in

modifier on parameters, to specify that an argument is passed by reference but not modified by the called method.
⮚Use the

ref readonly

modifier on method returns, to indicate that a method returns its value by reference but doesn't allow writes to that object.
⮚Declare

ref struct

types, to indicate that a struct type accesses managed memory directly and must always be stack allocated.
⮚Use additional generic constraints.
Non-trailing named arguments
     ⮚Named arguments can be followed by positional arguments.

⮚Leading underscores in numeric literals
    ⮚Numeric literals can now have leading underscores before any printed digits.

private protected access modifier
     ⮚The

private protected

access modifier enables access for derived classes in the same assembly.

⮚Conditional

ref

expressions
     ⮚The result of a conditional expression

(?:)

can now be a reference.
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