<Project Sdk="Microsoft.NET.Sdk.Web">
  <PropertyGroup>
    <TargetFramework>net5.0</TargetFramework>
  </PropertyGroup>

  <ItemGroup>
    <PackageReference Include="Swashbuckle.AspNetCore" Version="5.5.1" />
  </ItemGroup>
</Project>

using System.ComponentModel.DataAnnotations;

namespace Core3xSharedResource.Models.Account
{
    public class RegisterModel
    {
        [Required(ErrorMessage = "Please enter an email address")] // -->> from the shared resources
        [EmailAddress(ErrorMessage = "Please enter a valid email address")] // -->> from the shared resources
        public string Email { get; set; }

        [Required(ErrorMessage = "The {0} field is required")]
        [Display(Name = "User Name")]
        public string UserName { get; set; }
    }
}

<?xml version="1.0" encoding="utf-8"?>
<root>
  <data name="Please enter an email address" xml:space="preserve">
    <value>لطفا ایمیلی را وارد کنید</value>
  </data>
  <data name="Please enter a valid email address" xml:space="preserve">
    <value>لطفا ایمیل معتبری را وارد کنید</value>
  </data>
  <data name="The {0} field is required" xml:space="preserve">
    <value>{0} را تکمیل کنید</value>
  </data>
  <data name="User Name" xml:space="preserve">
    <value>نام کاربری</value>
  </data>
</root>