Question

I am trying to call a method that requires some parameters based on previous parameters chosen.

This is probably better explained with an example:

public static void MyMethod (string p1, string p2, string p3 = "", string p4 = "")
{
}

What I want to achieve is requiring p4 if p3 is given.

If I were to call it like this:

MyMethod("Hello", "World", "P3", // p4 now required as p3 given a value)

I hope this makes sense. Thanks.

Answer 1

Instead of default values for parameters (which has its own problems), I would use overloading:

public static void MyMethod (string p1, string p2)
{
   MyMethod(p1, p2, "", "");
}

public static void MyMethod (string p1, string p2, string p3, string p4)
{
   ...
}