Another solution:
using System;
class OddOrEvenIntegers
{
static void Main()
{
Console.WriteLine("Please write your number, so the expression can check whether it is odd or even:");
int n = int.Parse(Console.ReadLine());
bool result = n % 2 == 0;
Console.WriteLine("Your number {0} is even? Answer: {1}", n, result);
}
}