嵌入游标会导致面板崩溃

如果我使用此代码，我的面板（画布）崩溃：

Assembly asm = Assembly.GetExecutingAssembly();
        using (Stream resStream = asm.GetManifestResourceStream("Pie_X.blank.cur"))
        {
            CanvasCursor = new Cursor(resStream);
            resStream.Close();
        }
        using (Stream resStream = asm.GetManifestResourceStream("Pie_X.hand.cur"))
        {
            HandCursor = new Cursor(resStream);
            resStream.Close();
        }

这段代码如何不会导致它崩溃：

Assembly asm = Assembly.GetExecutingAssembly();
        using (Stream resStream = asm.GetManifestResourceStream("Pie_X.blank.cur"))
        {
            CanvasCursor = new Cursor(resStream);
            resStream.Close();
        }
        using (Stream resStream = asm.GetManifestResourceStream("Pie_X.blank.cur"))
        {
            HandCursor = new Cursor(resStream);
            resStream.Close();
        }

空白.cur是我从互联网上得到的光标，手.cur是我在 photoshop 中使用光标插件制作的光标。为什么我的光标无法加载，我尝试将大小减小到 30x30 像素，但它仍然崩溃。