Bits of .NET

Returning multiple values via out parameters is messy. Tuples with deconstruction are clean.

Old Way (out parameters):

public bool TryParse(string input, out int result, out string error)
{
    // Ugly signature, can't use in expressions
}

// Usage
if (TryParse(input, out int result, out string error))
{
    // ...
}

Tuple Return:

public (bool success, int result, string error) Parse(string input)
{
    if (int.TryParse(input, out int result))
        return (true, result, "");
    else
        return (false, 0, "Invalid number");
}

// Clean deconstruction
var (success, result, error) = Parse("123");
if (success)
{
    Console.WriteLine($"Result: {result}");
}

Named Tuples:

public (int min, int max, double average) GetStats(int[] numbers)
{
    return (
        min: numbers.Min(),
        max: numbers.Max(),
        average: numbers.Average()
    );
}

var stats = GetStats(numbers);
Console.WriteLine($"Min: {stats.min}, Max: {stats.max}");

Readable, type-safe, expression-friendly!