Migrating EF6 to EF Core 6.0 - Properties in partial class

Question

Hello,

Properties added in partial classes are recognized with EF6. With EF Core 6.0, there is no error when compiling, but an error occurs when loading data, new properties are not recognized.
As a workaround, we moved the new properties into a class with inheritance. This is more academic but induces a long code review.

public partial class Contacts  
{  
          public bool IsSelect {get; set;}  
          ........................  
}  

Error loading: IsSelect is not recognized

 public class ContactsExtend : Contacts  
    {  
                   public bool IsSelect {get; set;}  
  
    }  

No error

Answer 1

Solution :

using System.ComponentModel.DataAnnotations.Schema;  
  
public partial class Contacts  
    {  
       [NotMapped]  
       public bool? IsChecked { get; set; }