CSharp Feature Example

This is a repo that shows C# code examples of different features. These features are orgnized by versions of C#. From this, you could get more familiar with C# version history. And you can know more about how this language envolved in the past years.

Version 1.0

• Classes
• Structs
• Interfaces
• Delegates
• Events
• Attributes

Version 2.0

• Nullable value types
• Partial types
• Generics
• Iterators
• Covariance and Contravariance

Version 3.0

• Anonymous types
• Auto implemented properties
• Extension Methods
• Implicitly typed local variables
• Lambda
• LINQ
• Object and collection initializers
• Partial methods
• Expression Trees (To do)

Version 4.0

• Dynamic types
• Generic covariant and contra variant
• Named arguments
• Optional arguments
• Embedded interop types (Todo)

Version 5.0

• Asynchronous members
• Caller Info Attributes

Version 6.0

• Static imports
• Exception filters
• Auto-property initializers
• Expression bodied members
• Null propagator
• String interpolation
• nameof operator
• Index initializers

Version 7.0

• Out variables
• Tuples and Discards
• Deconstruct
• Pattern matching
• Local functions
• More expression bodied members
• Ref locals and resturns
• The throw expression

Version 7.1

• Async main
• Default literal expressions
• Pattern matching for generic types

Version 7.3

• Unmanaged constraints
• Tuple compare

Version 8.0

• Default interface methods
• Enhanced pattern matching(Todo)
• Using Declarations
• Static local functions
• Asynchronous streams
• Indices and ranges
• Null-coalescing assignment
• DisposeAsync (Todo)

Version 9.0 (It looks more like Python from this version.)

• Top level statements
• Record types
• Init only setters
• Pattern matching enhancements
• Enhanced new expressions
• Support for code generators (Todo)

Version 10.0

• Global using directives
• File scoped namespaces
• Lambda expression improvements