ExcitingFeatures

NotSureItsExcitingForYou.cs

1. public record Person(string FirstName, string LastName);


2.var person1 = new Person("Manoj", "L");
var person2 = person1 with { LastName = "Lingala" };

// Prints: Person { FirstName = Manoj, LastName = Lingala }
Console.WriteLine(person2);

3.public class Car
{
    public string Model { get; init; }
    public string Color { get; init; }
}

var car = new Car { Model = "Tesla", Color = "Red" };
// car.Model = "BMW"; // Compile-time error

4.
// Before C# 10
namespace MyNamespace
{
    public class MyClass { }
}

// C# 10
namespace MyNamespace;

public class MyClass { }

5.
// File: GlobalUsings.cs
global using System;
global using System.Collections.Generic;

///Pattern Matching
6. bool IsLetter(char c) => c is >= 'a' and <= 'z' or >= 'A' and <= 'Z';
7. string ClassifyTemperature(int temp) => temp switch
{
    < 0 => "Freezing",
    <= 15 => "Cold",
    <= 30 => "Warm",
    _ => "Hot"
};
8.string GetSeason(Month month) => month switch
{
    Month.December or Month.January or Month.February => "Winter",
    Month.March or Month.April or Month.May => "Spring",
    Month.June or Month.July or Month.August => "Summer",
    Month.September or Month.October or Month.November => "Fall",
    _ => throw new ArgumentOutOfRangeException(nameof(month))
};
9.bool IsFirstElementZero(int[] numbers) => numbers is [0, ..];

bool HasAtLeastThreeElements(int[] numbers) => numbers is [_, _, _, ..];