Bits of .NET

Variables you’ll never use clutter code. Discards (_) explicitly mark them as unused.

Tuple Deconstruction:

// Don't need middle value
var (first, _, last) = ("John", "middle", "Doe");

// Don't need first two
var (_, _, important) = GetThreeValues();

Out Parameters:

// Only care if it parses, not the value
if (int.TryParse(input, out _))
{
    Console.WriteLine("Valid number");
}

// Or multiple discards
dict.TryGetValue(key, out _);  // Just checking existence

Pattern Matching:

var result = obj switch
{
    (string s, _) => s,  // Ignore second tuple element
    (_, int n) => n.ToString(),  // Ignore first element
    _ => "Unknown"
};

Standalone Discard:

// Don't care about return value
_ = await SomeAsyncMethod();  // Just execute, ignore result

Makes intent explicit – compiler knows it’s intentional!