#594 – When You’d Want to Use Named Arguments

You can change the  order of arguments passed to a method in C# by using named arguments.  Simply changing the order of required arguments probably doesn’t make much sense.  Instead, you’ll likely make use of named arguments as a way of omitting optional parameters.

Without named arguments, when you want to include a value for an optional parameter, you normally have to include values for all arguments up to and including the one that you want to specify a value for.  But with named arguments, you can pick and choose which parameters you provide a value for.

Here’s a Dog.Bark method that has several optional parameters.

public void Bark(string barkSound, int numTimesToBark = 1, int volume = 1, string postBarkSound = null)

When calling Bark, we can choose which arguments to pass.

kirby.Bark("Woof", volume: 5);
kirby.Bark("Grrr", postBarkSound: "Arf");
kirby.Bark("Woof", 3, postBarkSound: "Growf");
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About Sean
Software developer in the Twin Cities area, passionate about .NET technologies. Equally passionate about my own personal projects related to family history and preservation of family stories and photos.

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