Steps to reproduce
Follow this simple tutorial.
The issue
Start the app either in Debug or Release.
An exception occurs with db.Database.Migrate();.
Exception thrown: 'Microsoft.Data.Sqlite.SqliteException' in Microsoft.Data.Sqlite.dll. Additional information: SQLite Error 14: 'unable to open database file'.
This is the very first step, Migrate() method should create the database if there is not any yet (it also fails with db.Database.EnsureCreated()).
Further technical details
EF Core Tools version: 1.0.0-preview2-final
EF Core Sqlite version: 1.0.0
UniversalWindowsPlatform version: 5.2.2
Visual Studio version: VS 2015 Update 3
Operating system: Windows 10 10586.494
It appears that, although the first-chance exception is thrown, it doesn't actually represent a bug as EF Core handles this and continues execution normally. However, it leads to a misinterpretation (the database is created anyway).
More info