Defaults for Constructor

I read in C++ vs C# section

C# does not provide defaults for constructors unlike C++

what does that mean?

You can add default values to contructors in C++

Code:

---

MyConstructor(int x = 0)
{
}

MyConstructor m; //fine
MyConstructor n(10); //fine

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As yor book says, doesnt work in C# though