How to use default parameters in C#?

c# .net parameters default-value optional-parameters
Chin picture Chin · Jul 30, 2009 · Viewed 15.9k times · Source

In other languages I can set up the method signature like

cookEgg(boolean hardBoiled = true)

This defaults the parameter hardboiled to true, if I don't receive a parameter in the method call.

How would I achieve this in C#?

Answer

Pavel Minaev picture Pavel Minaev · Jul 30, 2009

At present, you have to overload the method:

void cookEgg(bool hardBoiled) { ... }
void cookEgg() { cookEgg(true); }

C# 4.0 will add optional arguments - you will be able to write code exactly as in your original sample, and it will work as you'd expect.

Related questions

Get url parameters from a string in .NET

I've got a string in .NET which is actually a url. I want an easy way to get the value from a particular parameter. Normally, I'd just use Request.Params["theThingIWant"], but this string isn't from the request. I can …

Read More
thread with multiple parameters

Does anyone know how to pass multiple parameters into a Thread.Start routine? I thought of extending the class, but the C# Thread class is sealed. Here is what I think the code would look like: ... Thread standardTCPServerThread = new Thread(…

Read More
Mark parameters as NOT nullable in C#/.NET?

Is there a simple attribute or data contract that I can assign to a function parameter that prevents null from being passed in C#/.NET? Ideally this would also check at compile time to make sure the literal null isn't …

Read More