public ProgressPercentageIncrease(ProgressPercentage previousProgress, ProgressPercentage currnetProgress)
{
this.previousProgress = previousProgress;
this.currnetProgress = currnetProgress;
}
/// <summary>
/// Reports a progress update.
/// </summary>
/// <param name="value">
/// The value of the updated progress.
/// </param>
public void Report(ProgressPercentage value)
{
this.progress.Report(value);
}