✅ the type or namespace name 'ListingProjects' does not exist in the namespace models

public class ListingProjects_ver2 //I renamed the model class name as well 
{
    
    [System.ComponentModel.DataAnnotations.Key]
    [Required]
    public int? Id { get; set; } // Primary key for DTO
    
    [Required]
    public string? ListingName { get; set; } 

    [Required]
    [NotMapped]
    public IFormFile? ListingImage { get; set; } //this is the attribute I added 
}