オンラインC#コンパイラ

using System;

class Program {
    static void Main() {
        Console.WriteLine("Hello, World!");
    }
}

using System;

class Program {
    static void Main() {
        string name = "Alice";
        int age = 30;
        double height = 5.6;
        bool isStudent = true;
        Console.WriteLine($"{name} is {age} years old");
    }
}

using System;

class Program {
    static void Main() {
        int x = 10;
        if (x > 0) Console.WriteLine("Positive");
        else if (x == 0) Console.WriteLine("Zero");
        else Console.WriteLine("Negative");
    }
}

using System;

class Program {
    static void Main() {
        for (int i = 0; i < 5; i++)
            Console.WriteLine($"Count: {i}");

        string[] fruits = {"apple", "banana", "cherry"};
        foreach (string fruit in fruits)
            Console.WriteLine(fruit);
    }
}

using System;

class Program {
    static string Greet(string name, string greeting = "Hello") {
        return $"{greeting}, {name}!";
    }
    static void Main() {
        Console.WriteLine(Greet("Alice"));
        Console.WriteLine(Greet("Bob", "Hi"));
    }
}

using System;
using System.Collections.Generic;

class Program {
    static void Main() {
        var fruits = new List<string> { "apple", "banana", "cherry" };
        fruits.Add("date");
        Console.WriteLine(fruits[1]);

        var person = new Dictionary<string, object> { {"name", "Alice"}, {"age", 30} };
        Console.WriteLine(person["name"]);
    }
}

using System;

class Dog {
    public string Name { get; }
    public string Breed { get; }
    public Dog(string name, string breed) { Name = name; Breed = breed; }
    public string Bark() => $"{Name} says Woof!";
}

class Program {
    static void Main() {
        var dog = new Dog("Rex", "Labrador");
        Console.WriteLine(dog.Bark());
    }
}

using System;

class Program {
    static void Main() {
        try {
            int result = int.Parse("not a number");
        } catch (FormatException e) {
            Console.WriteLine($"Error: {e.Message}");
        } finally {
            Console.WriteLine("Done");
        }
    }
}

using System;
using System.IO;

class Program {
    static void Main() {
        File.WriteAllText("output.txt", "Hello, File!");
        string content = File.ReadAllText("output.txt");
        Console.WriteLine(content);
    }
}

using System;
using System.Linq;
using System.Collections.Generic;

class Program {
    static void Main() {
        var numbers = new List<int> { 1, 2, 3, 4, 5, 6, 7, 8, 9, 10 };
        var evens = numbers.Where(n => n % 2 == 0).ToList();
        var sum = numbers.Sum();
        Console.WriteLine($"Evens: {string.Join(", ", evens)}");
        Console.WriteLine($"Sum: {sum}");
    }
}