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SNET talks
2ª edição | 25 MAR 21
ASP.NET 5 and C# 9
Cássio Henrique
⬡ C# 9 new features
⬡ ASP.NET Core 5
ASP.NET Core 5 and C# 9 main features
Deep dive into main features
String manipulation is no longer needed.
Model binding now supports binding UTC time strings to DateTime
Ex: https://my-domain/controller/action?date=2019-06-14T02%3A30%3A04.0576719Z
Model binding DateTime as UTC
Record Types
C# 9.0 introduces record types, which are a reference type that provides synthesized
methods to provide value semantics for equality. Records are immutable by default.
Support c# 9
Record Types
Now i wonder what is this?
under the hood
Support c#9
Record types
Positional records
Support c# 9
Record types
A with expression instructs the compiler to create a copy of a record, but with specified properties
modified:
Support c# 9
Init only setters
Support c# 9
Before <= C# 7 After >= c# 9
Top level Statement
Pattern matching enhancements (and, or, not)
Support c# 9
New expressions
In C# 9.0, you can omit the type in a new expression when the created object's type is
already known.
Support c# 9
Support for code generators
Theme of another talk.
Library with code generators
Support c# 9
Model binding and validations with c# record types.
ASP.NET 5
Web API OpenAPI Specifications on by default.
ASP.NET 5
ASP.NET 5 - gRPC and .NET 5 are fast
Hub filters
SignalR - Hub filters
Thanks

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Asp.net Core 5 and C# 9 - #SnetTalks2