File size friendly display

.cs

private string ToFileSizeString(long size)
{
	string result;
	if (size < 1000L)
	{
		result = string.Format("{0} bytes", size);
	}
	else if (size < 1000000L)
	{
		result = string.Format("{0:F1} KB", (double)size / 1000.0);
	}
	else if (size < 1000000000L)
	{
		result = string.Format("{0:F1} MB", (double)size / 1000000.0);
	}
	else if (size < 1000000000000L)
	{
		result = string.Format("{0:F1} GB", (double)size / 1000000000.0);
	}
	else if (size < 1000000000000000L)
	{
		result = string.Format("{0:F1} TB", (double)size / 1000000000000.0);
	}
	else
	{
		result = size.ToString(CultureInfo.InvariantCulture);
	}
	return result;
}