从终端服务器上的 winforms 访问冲突

以下代码崩溃，对象在其他地方使用，gdiplus中的访问冲突.dll或各种令人讨厌的错误。

我立即想到了 Bitmap 对象上线程之间的竞争条件（因为 gdiplus 不是线程安全的），除了我根本不使用线程。此外，GDI 计数完全在限制范围内（我删除了 bmp。Dispose（） 在创建一个新的之前，看看这是否与它有任何关系。

它在我的计算机上运行良好，但一段时间后在我们的一台终端服务器上崩溃。

  public partial class Form1 : Form
{
    public Form1()
    {
        InitializeComponent();
        Random rnd = new Random();
        vx = 0.01f * rnd.NextDouble();
        vy = 0.01f * rnd.NextDouble();
    }
    private double x = 0;
    private double y = 0;
    private double vx = 0.01f;
    private double vy = 0.01f;
    private Bitmap bmp;
    private void timer1_Tick(object sender, EventArgs e)
    {
        this.label2.Text = "Thread from timer : " + System.Threading.Thread.CurrentThread.ManagedThreadId;
        bmp = new Bitmap(this.Width, this.Height);
        using (Graphics g = Graphics.FromImage(bmp))
        {
            g.Clear(Color.Black);
        }
        x += vx;
        y += vy;
        if (x > 1) { vx = -vx; x = 1; }
        if (y > 1) { vy = -vy; y = 1; }
        if (x < 0) { vx = -vx; x = 0; }
        if (y < 0) { vy = -vy; y = 0; }
        this.Refresh();
    }
    protected override void OnPaint(PaintEventArgs e)
    {
        try
        {
            this.label1.Text = "Thread from paint : " + System.Threading.Thread.CurrentThread.ManagedThreadId;
            if (bmp != null)
            {
                System.Threading.Thread.Sleep(1000);
                Graphics g = e.Graphics;
                g.Clear(SystemColors.Control);
                g.DrawImage(bmp, new Rectangle((int)(x * bmp.Width - 50), (int)(y * bmp.Height - 50), 50, 50));
            }
        }
        catch (Exception ex)
        {
            MessageBox.Show("Error: " + ex.GetType().FullName + " - " + ex.Message);
        }
    }
}

发生的情况：

Exception: System.InvalidOperationException
- Message: Object is currently in use elsewhere.
- Stacktrace: 
at System.Drawing.Image.get_Width()

或

Exception: System.InvalidOperationException
- Message: Object is currently in use elsewhere.
- Stacktrace: 
at System.Drawing.Image.get_RawFormat()

或

Faulting application name: TestBitmapRendering.exe, version: 1.0.0.0, time stamp: 0x54ae5fce
Faulting module name: gdiplus.dll, version: 6.1.7601.18455, time stamp: 0x535b1ac9

或

Exception Info: System.AccessViolationException
Stack:
   at System.Drawing.SafeNativeMethods+Gdip.GdipDrawImageRectI(System.Runtime.InteropServices.HandleRef, System.Runtime.InteropServices.HandleRef, Int32, Int32, Int32, Int32)