PercentComplete

PercentComplete.cs

public class PercentComplete : IDisposable
    {
        private readonly float _max;
        private readonly float _min;
        private readonly int _total;
        private int _current;

        public PercentComplete(int total)
            : this(total, 0, 100)
        {
        }

        private PercentComplete(int total, float min, float max)
        {
            _total = total;
            _min = min;
            _max = max;
        }

        public int IntValue
        {
            get { return (int)Math.Round(Calc(_current)); }
        }

        public float Value
        {
            get { return Calc(_current); }
        }

        public void Dispose()
        {
        }

        private float Calc(int current)
        {
            return _min + (current * (_max - _min)) / _total;
        }

        public void Next()
        {
            _current++;
        }

        public PercentComplete Next(int subTotal)
        {
            return new PercentComplete(subTotal, Calc(_current), Calc(++_current));
        }
    }