C# Implementation of a FizzBuzz coding test

FizzBuzz.cs

using System.CodeDom.Compiler;
using System.Collections.Generic;
using System.Collections;
using System.ComponentModel;
using System.Diagnostics.CodeAnalysis;
using System.Globalization;
using System.IO;
using System.Linq;
using System.Reflection;
using System.Runtime.Serialization;
using System.Text.RegularExpressions;
using System.Text;
using System;


class Result
{

    /*
     * Complete the 'fizzBuzz' function below.
     *
     * The function accepts INTEGER n as parameter.
     */

    public static void fizzBuzz(int n)
    {
        for (int i = 1; i <= n; i++) {
            bool once = false;
            if (i % 3 == 0) {
                Console.Write("Fizz");
                once = true;
            }
            if (i % 5 == 0) {
                Console.Write("Buzz");
                once = true;
            }
            if (!once) {
                Console.Write(i);
            }
            Console.Write("\n");
        }
    }

}
class Solution
{
    public static void Main(string[] args)
    {
        int n = Convert.ToInt32(Console.ReadLine().Trim());

        Result.fizzBuzz(n);
    }
}