When you have a crash, or a weird behavior, always check the player log which is located here - <user>\AppData\Local\Packages\<productname>\TempState. When submitting a bug, please include the player log as well, it can give invaluable information.

Starting from 07-12 you should be able to debug your scripts with Visual Studio. Currently it's only possible to debug C# scripts. Here are simple steps how to do it (these steps might change in the future builds):

• Go to build settings, select Type to be Visual Studio instead of AppX, you can ignore Autoconnect Profiler and Script Debugging checkoxes, on Metro they don't anything.

• Open the newly created solution file. It contains Assembly-CSharp.pdb, that means you are able to debug your C# files.
• The C# files are not included in this project, so you need to include them, to do so - in Solution Explorer right click on the Solution→Add→Existing Project, navigate to your Unity project and include Assembly-CSharp.csproj.
• You now have all of your C# files, and you can place the breakpoints you want.
• Before pressing F5, set Debug Type to Mixed (Managed and Native)
• Click F5 and enjoy, you should see something like this:

• 출처: 유니티코리아위키 (CC BY-NC-SA 2.0)