Why can't I set the startup form

Question

我在项目中创建了两个窗体，窗体1和窗体2，我想从窗体2启动项目，但是我不能选择它，因为下拉选择中只有窗体1，而没有窗体2，为什么会这样
I created two forms in the project, form 1 and form 2. I want to start the project from form 2, but I can't select it because there is only form 1 in the drop-down selection, but no form 2. Why is this

Thanks.

Answer 1

It is a known issue, which will be fixed: https://developercommunity.visualstudio.com/t/10039228.

Answer 2

Thank you very much for your reply. I will install the new version for testing