Which of these two GetLargestValue C# implementations is better, and why?

public int GetLargestValue(int[] values)
{
   try  {
          Array.Sort(values);
          return values[values.Length - 1];
        }
   catch (Exception){ return -1;}
}

public int GetLargestValue(int[] values)
{
    if(values == null)
        return -1;

    if(values.Length < 1)
        return -1;

    int highestValue = values[0];

    foreach(int value in values)
        if(value > highestValue)
            highestValue = value;

    return highestValue;
}