FizzBuzz in C# with Mono for Friday

FizzBuzz.cs

/*
  By Oto Brglez - <otobrglez@gmail.com>
  What is FizzBuzz? http://en.wikipedia.org/wiki/Fizz_buzz

  Requirements: Mono & Make
  Compile with: make
  Run with: mono ./FizzBuzz.exe
*/

using System;
using System.Text;

public class FizzBuzz {

  public String FizzBuzzFor(int i){
    StringBuilder stringBuilder = new StringBuilder();

    int c = 1;
    String tmp = "";
    while(c < i){
      tmp = "";

      if (c % 3 == 0) tmp = String.Concat(tmp, "Fizz");
      if (c % 5 == 0) tmp = String.Concat(tmp, "Buzz");
      if (tmp.Equals("")) tmp = String.Concat(tmp, c);

      tmp = String.Concat(tmp, " ");
      stringBuilder.Append(tmp);
      c = c + 1;
    }

    return stringBuilder.ToString();
  }
  
  public static void Main(String[] args){
    FizzBuzz fizzBuzz = new FizzBuzz();
    System.Console.WriteLine(fizzBuzz.FizzBuzzFor(100));
  }
}

Makefile

.PHONY: FizzBuzz.cs

all: run

FizzBuzz.exe: FizzBuzz.cs
	@gmcs FizzBuzz.cs

clean:
	@rm -f FizzBuzz.exe

run: FizzBuzz.exe
	@mono FizzBuzz.exe