添加多个项目的解决方案

这似乎是非常恼人的。我创建了一个空白的解决方案，现有项目或网站添加到它，然后解决方案文件夹中消失，它只是显示添加项目，所以我不能更多的项目或网站添加到解决方案...

This seems to be extremely annoying. I create a blank solution and add an existing project or website to it and then the solution folder disappears and it just shows the added project, so I can't add any more projects or websites to the solution...

的更新**

Update **

我不知道这是否是从分机或只是默认情况下，但在工具 - >选项 - >项目和解决方案，我发现所谓的总是显示解决方案的选项，这是听之任之。当我检查了解决方案文件夹出现这样我就可以在其上单击右键添加额外的项目。

I'm not sure if this was from an extension or just by default, but in the Tools -> Options -> Projects and Solutions I found an option called "Always show solution" and it was unchecked. When I checked it the solution folder appeared so that I could right-click on it to add additional projects.