SumOf3Integers

using System;

class SumOf3Integers
{
    static void Main()
    {
        Console.Write("Enter your first number: ");
        int firstNumber = int.Parse(Console.ReadLine());
        Console.Write("Enter your second number: ");
        int secondNumber = int.Parse(Console.ReadLine());
        Console.Write("Enter your third number: ");
        int thirdNumber = int.Parse(Console.ReadLine());

        Console.WriteLine("Sum of these numbers is " + (firstNumber + secondNumber + thirdNumber));
    }
}