Retructured solution

LiteCharms.Features/Email/Models/Attachment.cs

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+namespace LiteCharms.Features.Email.Models;
+
+public class Attachment
+{
+    public string? Name { get; set; }
+
+    public Stream? FileStream { get; set; }
+}

LiteCharms.Features/Email/Models/Body.cs

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+namespace LiteCharms.Features.Email.Models;
+
+public class Body : IDisposable
+{
+    public string? Message { get; set; }
+
+    public ReadOnlyCollection<Attachment>? Attachments { get; set; }
+
+    public BodyProperties Properties { get; set; } = new();
+
+    public void Dispose()
+    {
+        if (Attachments is null) return;
+
+        foreach (var attachment in Attachments!)
+        {
+            if (attachment is not null)
+            {
+                attachment.FileStream!.Close();
+                attachment.FileStream!.Dispose();
+            }
+        }
+
+        GC.SuppressFinalize(this);
+    }
+}

LiteCharms.Features/Email/Models/BodyProperties.cs

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+namespace LiteCharms.Features.Email.Models;
+
+public class BodyProperties
+{
+    public bool IsHtml { get; set; }
+
+    public bool HasAttachments { get; set; }
+}

LiteCharms.Features/Email/Models/EmailEnquiry.cs

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+using System.ComponentModel.DataAnnotations;
+
+namespace LiteCharms.Features.Email.Models;
+
+public sealed class EmailEnquiry
+{
+    [Required]
+    [MinLength(2)]
+    [MaxLength(255)]
+    [Display(Name = "Full Name")]
+    public string? FullName { get; set; }
+
+    [Required]
+    [EmailAddress]
+    [MinLength(5)]
+    [MaxLength(255)]
+    [Display(Name = "Email Address")]
+    public string? EmailAddress { get; set; }
+
+    [Required]
+    [MinLength(2)]
+    [MaxLength(255)]
+    [Display(Name = "Subject")]
+    public string? EmailSubject { get; set; }
+
+    [Required]
+    [MinLength(2)]
+    [MaxLength(2000)]
+    [Display(Name = "Message")]
+    public string? Message { get; set; }
+}

LiteCharms.Features/Email/Models/Message.cs

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+namespace LiteCharms.Features.Email.Models;
+
+public class Message : IDisposable
+{
+    public Party? Sender { get; set; }
+
+    public Party? Recipient { get; set; }
+
+    public string? Subject { get; set; }
+
+    public Body? Body { get; set; }
+
+    public void Dispose()
+    {
+        Body?.Dispose();
+
+        GC.SuppressFinalize(this);
+    }
+}

LiteCharms.Features/Email/Models/Party.cs

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+namespace LiteCharms.Features.Email.Models;
+
+public class Party
+{
+    public string? Name { get; set; }
+
+    public string? Address { get; set; }
+}

LiteCharms.Features/Email/Models/Response.cs

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+using LiteCharms.Features.Shop;
+
+namespace LiteCharms.Features.Email.Models;
+
+public class Response
+{
+    public int Code { get; set; }
+
+    public string? Error { get; set; }
+
+    public EmailStatuses Status { get; set; }
+
+    private Response(EmailStatuses status, int code = 0, string? error = null)
+    {
+        Status = status;
+        Code = code;
+        Error = error;
+    }
+
+    public static Response Create(EmailStatuses status, int code = 0, string? error = null) =>
+        new(status, code, error);
+}