public static void Main()
Console.WriteLine("Write a numer please");
num1 = int.Parse(Console.ReadLine());
Console.WriteLine("Write another number");
num2 = int.Parse(Console.ReadLine());
Console.WriteLine("Write another number");
num3 = int.Parse(Console.ReadLine());
if (num1 > num2 && num1 > num3)
Console.WriteLine(num1 + " is the highest");
else if (num2 > num1 && num2 > num3)
Console.WriteLine(num2 + " is the highest");
else if (num3 > num2 && num3 > num1)
Console.WriteLine(num3 + " is the highest");
else if (num1 == num2 || num1 == num3 || num2 == num3)
Console.WriteLine("Start again with different numbers");