Simple C# class for converting an integer into a file size with suffix.

FileSize.cs

public class FileSize
{
	long _value;
	long _reduced;
	string _units;

	public long Reduced { get { return _reduced; } }

	public string Units { get { return _units; } }

	public FileSize(long value)
	{
		_value = value;

		var units = new string[] { "B", "KB", "MB", "GB" };
		var sizeUnitIndex = 0;
		_reduced = value;
		while (_reduced > 1024)
		{
			_reduced /= 1024;
			sizeUnitIndex++;
		}
		_units = units[sizeUnitIndex];
	}
}