C# 버전별 추가된 기능 정리

C# 2.0

- Generics

- Nullable types

- Iterators

- Anonymouse methods (람다식의 조상)

- partial classes

- static classes

C# 3.0

- LINQ (Language Integrated Query)

- Implicitly typed local variables (var keyword)

- Object initializers

- Lambda expressions

- Extension methods

- Query expressions

- Expression trees

- Automatic properties

- Partial methods

C# 4.0

- Dynamic binding

- Optional parameters and named arguments

- Type variance with generic interfaces and delegates

- COM interoperability improvements

C# 5.0

- Asynchronous functions (async and await)

C# 6.0

- Null-conditional operator

- Expression-bodied functions

- Property initializers

- Index initializers

- String interpolation

- Exception filters (when)

- using static directives

- nameof

C# 7.0

- Numerical literal improvements

ex) int million = 1_000_000; (컴파일 시 "_" 무시됨)

- out variables and discards

- Patterns

1) is variables

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void Foo (object x) {     if (x is string s)     Console.WriteLine (s.Length); }

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2) switch statement

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switch (x) {     case int i:         Console.WriteLine ("It's an int!");         break;     case string s:         Console.WriteLine (s.Length); // We can use the s variable         break;     case bool b when b == true: // Matches only when b is true         Console.WriteLine ("True");         break;     case null:         Console.WriteLine ("Nothing");         break; } Colored by Color Scripter

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- Local methods

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void WriteCubes() {     Console.WriteLine(Square(3));       int Square(int value) => value * value; } Colored by Color Scripter

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- More expression-bodied members

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public class Person {     string name;       public Person (string name) => Name = name;       public string Name     {         get => name;         set => name = value ?? "";     }       ~Person () => Console.WriteLine ("finalize"); } Colored by Color Scripter

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- More expression-bodied members

- Tuples

- throw expressions