Slides for the "What's Coming in C# 9.0" session that is part of .NET Conf Israel 2020. Github repo: https://github.com/MoaidHathot/dotnet-conf-israel-2020-whats-coming-to-CSharp9

1. Moaid Hathot
Software Architect
Moaid.hathot@outlook.com
@MoaidHathot
https://moaid.codes
https://meetup.com/Code-Digest
What’s Coming in C# 9.0

2.  Released on November 10
 C# 9.0
.NET 5.0
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3. Functional Programming and C#
 C# 6.0
 Expression-bodied function members
 Null-conditional operators
 C# 7.0
 Pattern Matching
 Is operator
 Switch Match
 Expression-bodied members
 Throw Expressions
 C# 7.1
 Pattern matching on generic type parameters
 C# 8.0
 Switch expressions
 Property patterns
 Tuple patterns
 Positional patterns
 Null-coalescing assignment
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4. C# 9.0 features
 Records
 Init only setters
 Top-level statements
 Pattern matching enhancements
 Target-typed new expressions
 Extension GetEnumerator support for foreach loops
 static anonymous functions
 Covariant return types
 Lambda discard parameters
 Target-typed conditional expressions
 Attributes on local functions
 Native sized integers
 Function pointers
 Suppress emitting localsinit flag
 Module initializers
 New features for partial methods
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5. C# 9.0 features
 Records
 Init only setters
 Top-level statements
 Pattern matching enhancements
 Target-typed new expressions
 Extension GetEnumerator support for foreach loops
 static anonymous functions
 Covariant return types
 Lambda discard parameters
 Target-typed conditional expressions
 Attributes on local functions
 Native sized integers
 Function pointers
 Suppress emitting localsinit flag
 Module initializers
 New features for partial methods
5

6. C# 9.0 features
 Records
 Init only setters
 Top-level statements
 Pattern matching enhancements
 Target-typed new expressions
 Extension GetEnumerator support for foreach loops
 static anonymous functions
 Covariant return types
 Lambda discard parameters
 Target-typed conditional expressions
 Attributes on local functions
 Native sized integers
 Function pointers
 Suppress emitting localsinit flag
 Module initializers
 New features for partial methods
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7. About Moaid Hathot
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Moaid Hathot
 Software Architect & Code Jedi @ CodeValue
 Microsoft Azure MVP
 Been writing C# code every day for the last 10+ years
 Software Craftsmanship & Clean Code advocate
 Co-Founder of Code.Digest();
 https://meetup.com/Code-Digest

8. Demo
 C# 9 features!
 Requirements
 .NET 5.0
 Visual Studio 2019 16.8.0+
 JetBrains Rider 2020.3+
 Visual Studio Code
 LinqPad
 SharpLab.io
 Source Code
 Github Repo
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9. References
 .NET 5.0
 https://dot.net
 C# 9.0 features
 Overview
 https://docs.microsoft.com/en-us/dotnet/csharp/whats-new/csharp-9
 Specification
 https://docs.microsoft.com/en-us/dotnet/csharp/language-reference/proposals/csharp-9.0/records
 SharpLab.io
 https://sharplab.io
 Roslyn Feature Status
 https://github.com/dotnet/roslyn/blob/master/docs/Language%20Feature%20Status.md
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10. Q
A
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11. Moaid Hathot
Software Architect
moaid.hathot@outlook.com
@MoaidHathot
https://moaid.codes
https://meetup.com/Code-Digest