Problem with DbContext prop on asp net core 2.1 - asp.net-core

Question

I have created an api in asp net core 2.1 and I have three layers inside it (PwP.Web).
In the layer (PWP.DomainClasses) I defined a class with the following specifications and in the layer (PWP.DataLayer) a class called PWPDbContext and inside it I want to define the user class as prop but it warns and is not used, how this Solve the problem?
User.cs:
using System;
using System.Collections.Generic;
using System.ComponentModel.DataAnnotations;
using System.Text;
namespace PWP.DataLayer.User
{
public class User
{
[Key]
[Required]
public int UserId { get; set; }
[Required]
[MaxLength(50)]
public string UserName { get; set; }
[Required]
[MaxLength(32)]
public string Password { get; set; }
[Required]
[MaxLength(150)]
public string Email { get; set; }
[MaxLength(200)]
public string imageAddress { get; set; }
//
public virtual UserInfo.UserInfo UserInfo { get; set; }
}
}
PWPContext.cs:
using Microsoft.EntityFrameworkCore;
using PWP.DomainClasses.user;
namespace PWP.DataLayer.Context
{
class PWPDbContext:DbContext
{
public PWPDbContext(DbContextOptions<PWPDbContext> options): base(options)
{
}
public DbSet<User> Users { get; set; }
public DbSet<UserInfo> UserInfos { get; set; }
public DbSet<Document> Documents { get; set; }
public DbSet<Expertise> Expertises { get; set; }
public DbSet<Message> Messages { get; set; }
public DbSet<Record> Records { get; set; }
public DbSet<STFile> STFiles { get; set; }
}
}

Answer 1

From this line of code:
public virtual UserInfo.UserInfo UserInfo { get; set; }
It can be seen that you named the class with the exact same name as it's namespace.
You should differentiate between them.
Don't (!) do that:
namespace UserInfo
{
public class UserInfo
{
}
}