C# supply values for all optional parameters

Question

I\'m reading a book for C# and I\'m in the chapter of named and optional parameters. I\'ve read a bullet where it says:

\"If multiple optional paramet

Answer 1

It simply means that optional parameters must all be last in the parameter list.

public void Method(int param1, int param2 = 0, int param3 = 0)
{
    //This works
}

versus

public void Method(int param1 = 0, int param2 = 0, int param3) //Param3 isn't optional.
{
    //This does not!
}

public void Method(int param1 = 0, int param2, int param3 = 0) //Param2 isn't optional.
{
    //Neither does this!
}