Protected setter in Domain model

We have several classes with properties having protected setters.
As an example:

public class ProductDictionary : DictionaryModel<int, Product>
{
    public int Id { get; set; }
    public string Series { get; set; }

    //specific code
}

This class is derived from another base class.

public abstract class DictionaryModel<TMasterId, TMaster> where TMaster: IIdentifiable<TMasterId>
{
    public TMasterId MasterId { get; protected set; }
    public virtual TMaster Master { get; protected set; }
    public DateTime? EditedMappingDate { get; protected set; }
    public int? UserId { get; protected set; }

    //specific code to manipulate properties
}

Since there are protected setters for properties, we have this $metadata answer

<EntityType Name="ProductDictionary">
    <Key>
        <PropertyRef Name="Id" />
    </Key>
    <Property Name="Id" Type="Edm.Int32" Nullable="false" />
    <Property Name="Series" Type="Edm.String" />
</EntityType>

We do not want the client of these classes to have direct access to the specified properties.
Is there a way to access these properties without specifying each property in Startup.cs for each EntityType?