Swap variables elegantly in C#

Approach

Classic way

var a = 10;
var b = 20;

var aux = a;
a = b;
b = aux;

Check here the resulted IL

With tuple

var a = 10;
var b = 20;

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

Check here the resulted IL

Benchmark

For primitive types

For classes

Conclusion

In both cases the performance difference is not measurable.

The only difference is that the tuple approach is more readable and less error prone. So, use it! 🤓

References

• Tuple types (C# reference)
• Deconstructing tuples and other types