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C# 13.0

Character literal escape sequence

Field keyword (preview)

Implicit index access

Method group natural type improvements

New lock object

Allow params to use collections

Partial properties & indexers

C# 12.0

Alias any type

Collection expressions

Default lambda parameters

Experimental attribute

Inline arrays

Interceptors

Primary constructors

ref readonly parameters

C# 11.0

File local types

Generic attributes

Interpolated strings newline

Raw string literals

Required members

Static interface members

Unsigned right shift operator

UTF-8 string literals

C# 10.0

Caller argument expressions

Constant interpolated strings

Extended property patterns

File scoped namespaces

global using directives

Interpolated string handlers

Lambda improvements

Parameterless struct constructors

Record structs

C# 9.0

Covariant returns

Extending partial methods

Extension GetEnumerator

Function pointers

Init-only setters

Lambda discard parameters

Module initializers

Native integers

Records

Skip locals init

Static anonymous functions

Target-typed conditional expression

Target-typed new

Top-level statements

Type pattern improvements

C# 8.0

Async streams

Default interface methods

Null coalescing assignment

Null-forgiving operator

Nullable reference types

Ranges

readonly instance members

Recursive pattern matching

Static local functions

Switch expressions

Switch property patterns

Switch tuple patterns

C# 7.3

Auto-implemented property field attributes

Stackalloc array initializers

Unmanaged generic type constraints

C# 7.2

Conditional ref expressions

In parameter modifiers

Non-trailing named arguments

Numeric literal leading underscores

Private protected access modifier

readonly struct

ref readonly methods returns

ref struct

C# 7.1

Async main

Default literals

Generic type pattern matching

Infer tuple names

C# 7.0

Binary literals

Deconstruction

Digit separators

Discards

Expanded expression bodied members

Local function statements

Out variables

Pattern matching

Ref local variable

Ref return

Throw expressions

Tuples

C# 6.0

Auto property initializer

Exception filters

Expression bodied members

Index initializers

nameof operator

Null-conditional operators

using static

String interpolation

C# 5.0

Asynchronous members

Caller info attributes

C# 4.0

Dynamic binding

Embedded interop types

Generic contravariant

Generic covariant

Named arguments

Optional arguments

C# 3.0

Anonymous types

Auto implemented properties

Collection initializers

Expression trees

Extension methods

Implicitly typed local variables

Lambda expressions

Object initializers

Partial methods

Query expressions

C# 2.0

Anonymous methods

Generics

Iterators

Null-coalescing operator

Nullable value types

Partial types

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