欢迎来到MSDN论坛.

Welcome to MSDN forum.

您可以尝试创建另一个项目以检查问题是否存在，请 维修 Visual Studio 2017RC.

You could try to create another project to check if the issue exit and please repair visual studio 2017RC.

同时，在Visual Studio中禁用即时调试.

1. 在工具菜单上，单击选项.
2. 在调试文件夹中，选择 即时页面.
3. 在启用这些类型的代码的即时调试中 >框中，清除相关程序类型: 托管，本地或脚本.要禁用即时调试，一旦启用它，您必须以管理员权限运行.
4. 单击确定.

1. On the Tools menu, click Options.
2. In the Options dialog box, select the Debugging folder.
3. In the Debugging folder, select the Just-In-Time page.
4. In the Enable Just-In-Time debugging of these types of code box, clear the relevant program types: Managed, Native, or Script. To disable Just-In-Time debugging, once it has been enabled, you must be running with Administrator privileges.
5. Click OK.

最诚挚的问候，

Joyce