Another do, if method that I'm trying out.

using System;

namespace IntergerNumber
{
class Program
{
static void Main(string[] args)
{
Console.Write("Input an integer number ");

int i;

bool trueORfaulse = int.TryParse(Console.ReadLine(), out i );

outerUp:
while(trueORfaulse == false)
{
Console.Write("\nThis is not an integer number, try again ");
trueORfaulse = int.TryParse(Console.ReadLine(), out i);
}

while (trueORfaulse == true)
{
Console.Write("\nInput an integer number ");
trueORfaulse = int.TryParse(Console.ReadLine(), out i);

if (trueORfaulse == false) goto outerUp;
}
Console.ReadKey();
}
}
}