public int Compare(string version1, string version2)
{
    var version1Split = version1.Split('.').Select(s => Convert.ToInt32(s)).ToList();
    var version2Split = version2.Split('.').Select(s => Convert.ToInt32(s)).ToList();

    // pad arrays if needed
    if (version1Split.Count != version2Split.Count)
    {
        var smallestArray = version1Split.Count > version2Split.Count ? version2Split : version1Split;
        var biggestArray = version1Split.Count > version2Split.Count ? version1Split : version2Split;
        var difference = biggestArray.Count - smallestArray.Count;
        for (var i = 0; i < difference; i++)
            smallestArray.Add(0);
    }

    // compare
    for (var i = 0; i < version1Split.Count; i++)
    {
        if (version1Split[i] < version2Split[i]) return -1;
        else if (version1Split[i] > version2Split[i]) return 1;
    }

    return 0;
}