CuiLiang

有点复杂了，估计是搞不定的。😂 有兴趣的话可以修改代码试试。

临时修改的复现代码。根目录bin_net472里有编译好的。点截图里的位置就会崩溃了。 https://wwr.lanzoui.com/iWv1Vu1ucad 

@NaBian 刚下载最新代码测试了一下。demo需要两处修改来复现： 1） NativeComboBoxDemoCtl.xaml 里第二个ComboBox ```xaml ```` 2） ComboBoxDemoViewModel.cs 108行， `for (var i = 1; i

这个另外还引发了一个问题，因为在OnLoad以后SizeToContent了一次，一个原来通过在Onload里计算窗口尺寸并且让窗口居中显示的功能失败了。

Color picker is commonly used. If we have this control, it will be very Handly :) The following image is a demo of customizing UI style. Using control from [wpftoolkit](https://github.com/xceedsoftware/wpftoolkit/wiki/ColorPicker)....

> I can see in the first picture that you have implemented this yourself So why not send a PR? no....😂 just combined some small images, not real control. It's...

另一个相关的问题，可以用楼上的方法解决。 如果选项位于列表的低端，窗口加载之后，这些选项不会被显示。 只有在滚动到那个位置的时候才会显示出来。 https://user-images.githubusercontent.com/1972649/104321969-4848a680-551f-11eb-86f0-8a7cb75f80d0.mp4

 此问题依然存在

Version 2.4.0 still have this problem. It was caused by some invalid windows state, can be fixed by reboot windows. I saw there is `try' on line: https://github.com/punker76/gong-wpf-dragdrop/blob/ce3bfe6b34aeec67b5f9f1400fb2646262dd8689/src/GongSolutions.WPF.DragDrop/DragDrop.cs#L560 But it...

> @cuiliang And where does it happen? Inside a VM or on real OS? Sorry, I dont know. It's automatic reported from customer computer when unhandled exception occured. I think...