Ef6: "Sequence contains no matching element" message when generating migration for derived class

Created on 22 Aug 2018 · 2Comments · Source: dotnet/ef6

I will explain using code from solution that I develop.

I have class TextTranslation:
```c#
public class TextTranslation
{
public Guid TextTranslationId { get; set; }

    public string Name { get; set; }
    public string Text { get; set; }


    public Guid LanguageId { get; set; }
    public Language Language { get; set; }
}

I generated migration for **TextTranslation**.

Then I declared two classes **Page** and **PageTextTranslation**:

```c#
    public class Page
    {
        public Guid PageId { get; set; }
        public string Name { get; set; }

        public List<PageTextTranslation> TextTranslations { get; set; }
    } 

    public class PageTextTranslation : TextTranslation
    {
        //public Guid PageTextTranslationId { get; set; }

        //public string Name { get; set; }
        //public string Text { get; set; }

        //public Guid LanguageId { get; set; }
        //public Language Language { get; set; }

        public Guid PageId { get; set; }
        public Page Page { get; set; }
    }

When I generate new migration for those classes I get message "Sequence contains no matching element".
When I comment inheritance for class PageTextTranslation from TextTranslation and uncomment lines, then migration generation is okay.