试着写一个从华氏温度到摄氏温度的TempConverter;但它并不是在所有情况下都写0

using System;      
class TemperatureConverter
{
    static void Main()
    {    
        //Tc = temperature in degrees Celsius
        //Tf = temperature in degrees Fahrenheit   
        Console.WriteLine("What is the Celsius Temperature: ");
        int Tf = int.Parse(Console.ReadLine());
        float Tc;
        Console.WriteLine("Temperature in Celsius is  {0} ", Tc = (5 / 9) * (Tf - 32));    
    }
}

我想我没有，我有很长的路要走，不知道我搞砸了什么