Debug code-first Entity Framework migration codes

I know that EF Code First Migrations is relatively new tool but don’t forget about you are still in .NET.

So you can use:

if (System.Diagnostics.Debugger.IsAttached == false)
{
    System.Diagnostics.Debugger.Launch();
}

After that you can see your InnerException.

Or you can use try…catch statement like this:
Exception handling Entity Framework