feat(*): Add base project files

EmailService/EmailConfiguration.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace EmailService
+{
+    public class EmailConfiguration
+    {
+        public string From { get; set; }
+        public string SmtpServer { get; set; }
+        public int Port { get; set; }
+        public string UserName { get; set; }
+        public string Password { get; set; }
+    }
+}

EmailService/EmailSender.cs

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+using MailKit.Net.Smtp;
+using MimeKit;
+using System;
+using System.IO;
+using System.Linq;
+using System.Threading.Tasks;
+
+namespace EmailService
+{
+    public class EmailSender : IEmailSender
+    {
+        private readonly EmailConfiguration _emailConfig;
+
+        public EmailSender(EmailConfiguration emailConfig)
+        {
+            _emailConfig = emailConfig;
+        }
+
+        public void SendEmail(Message message)
+        {
+            var emailMessage = CreateEmailMessage(message);
+
+            Send(emailMessage);
+        }
+
+        public async Task SendEmailAsync(Message message)
+        {
+            var mailMessage = CreateEmailMessage(message);
+
+            await SendAsync(mailMessage);
+        }
+
+        private MimeMessage CreateEmailMessage(Message message)
+        {
+            var emailMessage = new MimeMessage();
+            emailMessage.From.Add(new MailboxAddress(_emailConfig.From));
+            emailMessage.To.AddRange(message.To);
+            emailMessage.Subject = message.Subject;
+
+            var bodyBuilder = new BodyBuilder { HtmlBody = string.Format("<h2 style='color:red;'>{0}</h2>", message.Content) };
+
+            if (message.Attachments != null && message.Attachments.Any())
+            {
+                byte[] fileBytes;
+                foreach (var attachment in message.Attachments)
+                {
+                    using (var ms = new MemoryStream())
+                    {
+                        attachment.CopyTo(ms);
+                        fileBytes = ms.ToArray();
+                    }
+
+                    bodyBuilder.Attachments.Add(attachment.FileName, fileBytes, ContentType.Parse(attachment.ContentType));
+                }
+            }
+
+            emailMessage.Body = bodyBuilder.ToMessageBody();
+            return emailMessage;
+        }
+
+        private void Send(MimeMessage mailMessage)
+        {
+            using (var client = new SmtpClient())
+            {
+                try
+                {
+                    client.Connect(_emailConfig.SmtpServer, _emailConfig.Port, true);
+                    client.AuthenticationMechanisms.Remove("XOAUTH2");
+                    client.Authenticate(_emailConfig.UserName, _emailConfig.Password);
+
+                    client.Send(mailMessage);
+                }
+                catch
+                {
+                    //log an error message or throw an exception, or both.
+                    throw;
+                }
+                finally
+                {
+                    client.Disconnect(true);
+                    client.Dispose();
+                }
+            }
+        }
+
+        private async Task SendAsync(MimeMessage mailMessage)
+        {
+            using (var client = new SmtpClient())
+            {
+                try
+                {
+                    await client.ConnectAsync(_emailConfig.SmtpServer, _emailConfig.Port, true);
+                    client.AuthenticationMechanisms.Remove("XOAUTH2");
+                    await client.AuthenticateAsync(_emailConfig.UserName, _emailConfig.Password);
+
+                    await client.SendAsync(mailMessage);
+                }
+                catch
+                {
+                    //log an error message or throw an exception, or both.
+                    throw;
+                }
+                finally
+                {
+                    await client.DisconnectAsync(true);
+                    client.Dispose();
+                }
+            }
+        }
+    }
+}

EmailService/EmailService.csproj

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+<Project Sdk="Microsoft.NET.Sdk">
+
+  <PropertyGroup>
+    <TargetFramework>net5.0</TargetFramework>
+  </PropertyGroup>
+
+  <ItemGroup>
+    <PackageReference Include="Microsoft.AspNetCore.Http.Features" Version="5.0.4" />
+    <PackageReference Include="NETCore.MailKit" Version="2.0.3" />
+  </ItemGroup>
+
+</Project>

EmailService/IEmailSender.cs

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+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Threading.Tasks;
+
+namespace EmailService
+{
+    public interface IEmailSender
+    {
+        void SendEmail(Message message);
+
+        Task SendEmailAsync(Message message);
+    }
+}

EmailService/Message.cs

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+using Microsoft.AspNetCore.Http;
+using MimeKit;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+
+namespace EmailService
+{
+    public class Message
+    {
+        public List<MailboxAddress> To { get; set; }
+        public string Subject { get; set; }
+        public string Content { get; set; }
+
+        public IFormFileCollection Attachments { get; set; }
+
+        public Message(IEnumerable<string> to, string subject, string content, IFormFileCollection attachments = null)
+        {
+            To = new List<MailboxAddress>();
+
+            To.AddRange(to.Select(x => new MailboxAddress(x)));
+            Subject = subject;
+            Content = content;
+            Attachments = attachments;
+        }
+    }
+}