C Sharp

C# 8.0 and .Net Core 3.0

Intro

Here is the history of C#

• 2.0 included generics
• 3.0 Added Linq with Lambda and anonymous types
• 4.0 Added Dynamics
• 5.0 Added Async and Await
• 6.0 Added Null propagating operator (targer?.IsActive ?? false;
• 7.0 Expressions and Tuples

C# 8.0 brings

• Nullable Reference Types
• Pattern Matching
• Indices and Ranges
• Built-in Json Support
• Windows Desktop Support
• Build and Deploy Improvements
• Other Language Improvements
• Other .NET Core Platform Improvements

Nullable Reference Types

This allows you to specify a possibility of null. e.g.

class
{
    public string? Title {get; set;}
    public List<Comment> Title {get;} = new List<Comment>();
}

Bad code is highlighted a compile time with CS8618 Non-nullable property and via intellisence.

You and enable and restore this feature on a file basis using #nullable enable' and nullable restore

Pattern Matching

class
{
    public string? Title {get; set;}
    public List<Comment> Title {get;} = new List<Comment>();
}