ValueTuple

This section looks into tips and tricks of the ValueTuple type which was introduced in C# 7.

Easy IEquatable implementation

ValueTuple can be leveraged to have an easy and readable implementation of IEquatable.

public class Dimension : IEquatable<Dimension>
{
    public Dimension(int width, int height)
        => (Width, Height) = (width, height);

    public int Width { get; }
    public int Height { get; }

    public bool Equals(Dimension other)
        => (Width, Height) == (other?.Width, other?.Height);

    public override bool Equals(object obj)
        => obj is Dimension dimension && Equals(dimension);

    public override int GetHashCode() 
        => (Width, Height).GetHashCode();
}

Swap two values

ValueTuple can be used to swap two (or more) variables without the usage of a temporary variable.

❌ Bad Using temporary variable.

int a = 10;
int b = 15;

var tmp = a;
a = b;
b = tmp;

✅ Good Using ValueTuple.

int a = 10;
int b = 15;

(a, b) = (b, a);