code-first Archives - IT Nursery

The model backing the context has changed since the database was created

The error message : “The model backing the ‘AddressBook’ context has changed since the database was created. Either manually delete/update the database, or ...

May 21, 2022
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Entity Framework Code First – two Foreign Keys from same table

I’ve just started using EF code first, so I’m a total beginner in this topic. I wanted to create relations between Teams and ...

May 17, 2022
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Validation failed for one or more entities while saving changes to SQL Server Database using Entity Framework

I want to save my Edit to Database and I am using Entity FrameWork Code-First in ASP.NET MVC 3 / C# but I ...

May 13, 2022
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Why use ICollection and not IEnumerable or List on many-many/one-many relationships?

I see this a lot in tutorials, with navigation properties as ICollection<T>. Is this a mandatory requirement for Entity Framework? Can I use ...

May 7, 2022
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