Program to implement RamaKrishna, C#

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//Rextester.Program.Main is the entry point for your code. Don't change it.
//Compiler version 4.0.30319.17929 for Microsoft (R) .NET Framework 4.5

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text.RegularExpressions;

namespace Rextester
{
    public class Program
    {
        /*
        program prints from 1 to 100 and for multiples of 3, it prints 'Rama' and for multiples of five it prints 'Krishna' instead of numbers. 
        For numbers which are multiples of both 3 and 5, it prints RamaKrishna.
        */
        public static void Main(string[] args)
        {
            string str = "";
            for (int i = 1; i < 101; i++)
            {
                if ((i % 3 == 0) && (i % 5 == 0))
                    str += "RamaKrishna" + "\n";
                else if (i % 3 == 0)
                    str += "Rama" +  "\n";
                else if (i % 5 == 0)
                    str += "Krishna" + "\n";
                else
                    str += i.ToString() + "\n";
            }
            
            Console.WriteLine(str);
        }
    }
}

Show compiler warnings [ + ] Show input
Compilation time: 0,43 sec, absolute running time: 0,52 sec, cpu time: 0,52 sec, average memory usage: 17 Mb, average nr of threads: 3, absolute service time: 1 sec