Question

Does the {0} represent the first argument “numerator” and {1} represent the second argument “denominator” passed to parameters of the writeLine method?

Another question is why does the method say argument #1 and #2 are objects? Integers are primitive data types.

I come from a Java background so the method description seems confusing.

using System;

    struct Fraction
    {
        public int denominator;
        public int numerator;

        public void Print()
        {
            Console.WriteLine("{0}/{1}", numerator, denominator);
            Console.ReadKey();
        }

    }

    public class structTest
    {
        public static void Main()
        {
            Fraction f; 
            f.numerator = 8;
            f.denominator = 6;

            f.Print();
        }
    }

Answer 1

First question: yes.

Second question:

In C# primitives (int, double etc), they are simply aliases to .NET defined types. That’s why they’re not properly “primitives,” since they’re actually hiding standard classes and structs.

So int is alias for Int32 and so on. More here