听起来好像你的实际文件和你的项目设置已经出来了步骤。最简单的方法是创建一个新项目，然后复制所需的源代码。

It sounds as though your actual files and your project settings have become out of step. The simplest thing to do would be to create a new project and just copy over the sources that you need.

请按照MSDN的说明进行操作：删除或删除项目或项目 - SQL Server Microsoft Docs [ ^ ]

Please, follow the instruction from MSDN: Remove or Delete an Item or Project - SQL Server | Microsoft Docs[^]

删除项目项目：

To remove a project item:

1. 在解决方案资源管理器中，选择要删除的项目项目。
2. 在编辑菜单上，单击删除。
3. 在确认对话框中，单击删除以从项目中删除该项目。

文件系统上仍存在已删除的项目。因此，您可以将删除的项目添加到其原始解决方案或其他解决方案。

A removed item still exists on the file system. Therefore, you can add a removed item to its original solution or to another solution.

如果你无法找到文件，您可以在左侧窗格中看到它，请转到：

IF you can not locate file and you're able to see it in the left pane, go to:

Tools->Options->Projects and Solutions->Track Active Item in Solution Explorer

如果无法访问上述内容，请按照以下说明操作：视觉工作室提示＃8：使用全部显示添加现有文件文件 - 大脑转储 [ ^ ]

然后，您将能够从解决方案资源管理器中删除该文件。 />


最后，您始终可以显示所有文件：解决方案资源管理器不显示文件夹，尽管该文件夹存在于我的本地驱动器（本地副本）Visual Studio - Stack Overflow [ ^ ]



祝你好运！

If above is inaccessible, follow the instruction from: Visual Studio Tip #8: Adding existing files with Show All Files – The Brain Dump[^]
Then you'll be able to remove that files from solution explorer.

Finally, you can always show all files: Solution Explorer doesnt show the folder although the folder is present in my local drive (local copy) Visual studio - Stack Overflow[^]

Good luck!