PropertyGroup with value that starts with "ProjectTypeGuids" causes project to not load correctly in Visual Studio

### Steps to reproduce

1. Create a new project file and add a PropertyGroup with a value that starts with "ProjectTypeGuids", e.g.:
Project file
```xml

ProjectTypeGuidsANYTHINGCANGOHERE

```
2. Try to load the project file in Visual Studio

### Expected behavior

Project would be loaded normally, as can be seen with any other value:

### Actual behavior
Error MessageBox is displayed:

and the project fails to load:

### Environment data