FizzBuzz.cs

using System;

namespace ConsoleApp1
{
    class Program
    {
        static void Main(string[] args)
        {
			for (int i = 1; i <= 100; i++)
			{
				string output = string.Empty;

				if (i % 3 == 0)
				{
					output += "Fizz";
				}

				if (i % 5 == 0)
				{
					output += "Buzz";
				}

				Console.WriteLine((output == string.Empty) ? i.ToString() : output);	
			}

			Console.ReadLine();
		}
    }
}