Overloaded function with params string[] in the signature

Question

I have these two functions

    public static string Function1 (string id, params string[])
    {
       return Function1(id, null, null, params)
    }

public static string Function1 (string id, string id2, Object a, params string[])
{
      string id = id,
      if (IsValidId(id))
      {
            start = new ProcessStartInfo();
            start.Arguments = params;
            if (string.IsNullOrEmpty(id2)==false)
            {
                start.RedirectStandardOutput = true;
            }
      }
}

I want to use the second overload when I do the following call

MyStaticClaass.Function1(
        input1,
        input2,
        null, // (This one represents the Object)
        input3,
        input4,
        input5);

Is there a way I can force it to go to the second definition of the method?

The compilation error I have is: This call is ambiguous between the following methods or properties: (and then the two methods above)

PS: I haven't chose to have these two functions. I can't change their signature or their names.

Answer 1

You can use Named arguments to overload a specific function like

 Program.Function1(
        id: input1,
        id2: input2,
        o:null,
        array: new string[] {input3,
            input4,
            input5});

and it will hit the function

public static string Function1 (string id, string id2, Object o, params string[] array)
{

}

for more detail you can check this Named Arguments

Answer 2

It can be like this as well:

var result = Rootobject.Function1(
               "",
               "",
               null, // (This one represents the Object)
               new string[] { "", "", ""});

However, since you already know this is a fragile design or you wouldn't have ended here asking about it, perhaps you should rethink your overloads. Of course, we got it to work but it is not a good design.