C# 俄罗斯方块

using System;
using System.Drawing;
using Microsoft.Win32;

namespace AnotherBlock
{
/// <summary>
/// Represents a Tetris game engine.
/// </summary>
public class Game
{
/// <summary>
/// Constant with the image width of the block unit (in pixels).
/// </summary>
public const int BlockImageWidth = 21;
/// <summary>
/// Constant with the image height of the block unit (in pixels).
/// </summary>
public const int BlockImageHeight = 21;
/// <summary>
/// Constant with the playing field width (in block units).
/// </summary>
public const int PlayingFieldWidth = 10;
/// <summary>
/// Constant with the playing field height (in block units).
/// </summary>
public const int PlayingFieldHeight = 20;
/// <summary>
/// Constante with the number of li