Round #870

Implement a record type 'Money' with Amount (decimal) and Currency (string). Override ToString to print '€100.00 EUR'-style and show value equality with two instances.

```csharp using System; public class Money { public decimal Amount { get; } public string Currency { get; } public Money(decimal amount, string currency) { Amount = amount; Currency = currency; } public override string ToString() { return $"{Amount:F2} {Currency}"; } public override bool Equals(object obj) { if (obj is Money other) { return Amount == other.Amount && Currency == other.Currency; } return false; } public override int GetHashCode() { unchecked { return (Amount.GetHashCode() * 397) ^ Currency.GetHashCode(); } } } class Program { static void Main(string[] args) { var money1 = new Money(100, "EUR"); var money2 = new Money(100, "EUR"); Console.WriteLine(money1); // Output: 100.00 EUR Console.WriteLine(money1.Equals(money2)); // Output: True } } ```

```csharp public record Money(decimal Amount, string Currency) { public override string ToString() { return $"{Amount:F2} {Currency}"; } public override bool Equals(object? obj) { if (obj is Money money) { return Amount == money.Amount && Currency == money.Currency; } return false; } public override int GetHashCode() { return HashCode.Combine(Amount, Currency); } } public class Program { public static void Main() { var money1 = new Money(100, "EUR"); var money2 = new Money(100, "EUR"); var money3 = new Money(100, "USD"); Console.WriteLine(money1); // Outputs: 100.00 EUR Console.WriteLine(money1.Equals(money2)); // Outputs: True Console.WriteLine(money1.Equals(money3)); // Outputs: False } } ``` This implementation provides a `Money` record type with `Amount` and `Currency` properties, overriding `ToString` to print the amount and currency in the desired format. The `Equals` method is also overridden to compare two `Money` instances based on their amount and currency, and `GetHashCode` is implemented to ensure correct behavior when using `Money` instances in hash-based collections. The `Main` method demonstrates the usage of the `Money` record type and its overridden methods.