The entity type ‘DisplayDetails’ requires a primary key to be defined. If you intended to use a keyless entity type, call ‘HasNoKey’ in ‘OnModelCreating’. For more information on keyless entity types, see https://go.microsoft.com/fwlink/?linkid=2141943.

Solution:

If you intend to create a table without a primary key in the database just add [Keyless] before class name

as follows:

[Keyless]
public class DisplayDetails
{
}

You might come across the error when you add “keyless” that is because you also need to add this using statement:

using Microsoft.EntityFrameworkCore;