Connexion to LocalDB

Hi,
I try to an application blazor WASM and I try to create DB.

I've created in BlazorApp1.Shared.Models the class :

using System;
using System.Collections.Generic;
using System.Text;

namespace BlazorApp1.Shared.Models
{
class Developer
{
public int Id { get; set; }
public string ECR { get; set; }
public DateTime DateCrea { get; set; }
public string Atelier { get; set; }
public string Nom { get; set; }
public string PNC { get; set; }
}
}

I've created in BlazorApp1.Server.Data the class

using Microsoft.EntityFrameworkCore;
using BlazorApp1.Shared.Models;

>

namespace BlazorApp1.Server.Data
{
public class ApplicationDBContext : DbContext
{
public ApplicationDBContext(DbContextOptions<ApplicationDBContext> options) : base(options)
{
}
public DbSet<Developer> Developers { get; set; }
}
}

When I bluid I have the error :

CS0122 'Developer' est inaccessible en raison de son niveau de protection ; Project : BlazorApp1.server ; File : ApplicationDBContext

It does not recognize the Developer class in DbSet<Developer>.

Have you an idea about this issue?

Thanks in advance