Converting String to int

using System;

class First{

public static void Main(){

string num1;

string num2;

float total;

Console.WriteLine("Enter Number 1 : ");

num1=Console.ReadLine();

Console.WriteLine("Enter Number 2 : ");

num2=Console.ReadLine();

total= int.Parse(num1)+int.Parse(num2);

Console.WriteLine("Total is : "+total);

num2=Console.ReadLine();

}

}