Find smallest and second smallest elements in an array

SmallestAndSecondSmallest.cs

static void Main(string[] args)
{
    var input = new int[] { 1, 4, 3, 5, 6, 7, 8, 1 };

    var smallest = input[0];
    var secondSmallest = input[1];

    if(smallest > secondSmallest)
    {
        var aux = smallest;
        smallest = secondSmallest;
        secondSmallest = aux;
    }

    for (var i = 2; i < input.Length; i++)
    {
        if (smallest > input[i])
        {
            secondSmallest = smallest;
            smallest = input[i];
        }
        else if (secondSmallest > input[i] && input[i] != smallest)
        {
            secondSmallest = input[i];
        }
    }

    Console.WriteLine(smallest);
    Console.WriteLine(secondSmallest);

}