Whats wrong with this code?

Question

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace SoloLearn
{
class Program
{
static void Main(string[] args)
{

static int Sum(int a, int b){

return a +b;
}

static int Sum(int a, int b, int c=2){

return a + b + c;
}

//If we now write this in main:

int a;
a = Sum(4,5);

//It gives some errors ( for e.g it says static is not valid)
}
}
}

//It gives some errors ( for e.g it says static is not valid)
//Also will it give '9' or '11' and why?

Answer 1

You are writing the static Sum methods inside the Main method, if you move the Sum methods outside it can run just fine. Another thing, I think giving a default value for <c> parameter in the Sum overload is ambiguous, it's confusing which method to invoke when two arguments were passed, because that <c> parameter have default value IMHO : )