主方法(winforms)中的参数Exception

     static void Main()
    {
        Application.EnableVisualStyles();
        Application.SetCompatibleTextRenderingDefault(false);
        Application.Run(new SpaceInvaders());// i get an error here when i start the form application.. it says Argument Exception. Parameter is not valid
    }

我的主表单是这样的:

    public SpaceInvaders()
    {
        InitializeComponent();
    }
    public void SpaceInvaders_Load(object sender, EventArgs e)
    {
}

这里是堆栈跟踪

" at System.Drawing.Graphics.GetHdc()'r'n at System.Drawing.BufferedGraphics。RenderInternal(HandleRef refTargetDC, BufferedGraphics缓冲区)'r'n at System.Drawing.BufferedGraphics.Render()'r'n at system . windows . forms . control . wmppaint (Message&m)'r'n at system . windows . forms . control . windowproc (Message&m)'r'n at System.Windows.Forms.ScrollableControl.WndProc(Message&m)'r'n at system . windows . forms . containercontrol . windowproc (Message&m)'r'n at system . windows . forms . form . windowproc (Message&m)'r'n at System.Windows.Forms.Control.ControlNativeWindow.OnMessage(Message&m)'r'n at system . windows . forms . control . controlnativewindow . windowproc (Message&m)'r'n at System.Windows.Forms.NativeWindow。DebuggableCallback(IntPtr hWnd, Int32 msg, IntPtr wparam, IntPtr lparam)'r'n at system . windows . forms . unsafenativeemethods . dispatchmessagew (MSG&'r'n at System.Windows.Forms.Application.ComponentManager.System.Windows.Forms.UnsafeNativeMethods.IMsoComponentManager. msg 'r'nFPushMessageLoop(Int32 dwComponentID, Int32 reason, Int32 pvLoopData)'r'n at System.Windows.Forms.Application.ThreadContext. confRunMessageLoopInner(Int32 reason, ApplicationContext context)'r'n at System.Windows.Forms.Application.ThreadContext。runmessagelloop (Int32 reason, ApplicationContext context)'r'n at System.Windows.Forms.Application。运行(窗体mainForm)'r'n at WindowsFormsApplication1.Program.Main() in D:'Documents and Settings'Dima'My Documents'Visual Studio 2008'Projects'SpaceInvaders'SpaceInvaders'Program.cs:line 18'r'n at System.AppDomain。_nExecuteAssembly(Assembly Assembly, String[] args)'r'n at System.AppDomain。ExecuteAssembly(String assemblyFile, Evidence assemblySecurity, String[] args)'r'n at Microsoft.VisualStudio.HostingProcess.HostProc.RunUsersAssembly()'r'n at System.Threading.ThreadHelper。ThreadStart_Context(对象状态)'r'n at System.Threading.ExecutionContext。运行(ExecutionContext ExecutionContext, ContextCallback, callback, Object state)'r'n at System.Threading.ThreadHelper.ThreadStart()"

"参数无效。"

我想我找到问题了。

  public void Draw(Graphics  g,int animationCell)
    {
     // some code
        g.dispose()//that method threw the exception can someone tell me why? i thought you do need to dispose your graphics object at the end when you finish using it.
       }