Integrate Sendinblue Transactional Email in C#

using System; 
using System.Collections.Generic; 
using System.Linq; 
using System.Web; 
using System.Web.UI; 
using System.Web.UI.WebControls; 
using mailinblue; 
namespace SendinblueTest { 
	public partial class index : System.Web.UI.Page { 
		protected void Page_Load(object sender, EventArgs e) { 
			API sendinBlue = new mailinblue.API("add you api key"); 

			//add your api key here Dictionary
			<string, Object> data = new Dictionary<string, Object>(); 
			Dictionary<string, string> to = new Dictionary<string, string>(); 
			to.Add("to@email.com", "to whom!"); 
			List<string> from_name = new List<string>(); 
			from_name.Add("from@email.com"); 
			from_name.Add("from email!"); 
			List<string> attachment = new List<string>(); 
			attachment.Add("https://domain.com/path-to-file/filename1.pdf"); 
			attachment.Add("https://domain.com/path-to-file/filename2.jpg"); 
			data.Add("to", to); 
			data.Add("from", from_name); 
			data.Add("subject", "My subject"); 
			data.Add("html", "This is the <h1>HTML</h1>"); 
			data.Add("attachment", attachment); 
			Object sendEmail = sendinBlue.send_email(data); 
			response.InnerHtml = sendEmail.ToString(); 
		} 
	} 
}

/* To send attachment/s generated on the fly you have to pass your attachment/s filename & its base64 encoded chunk data in key-value pair in attachment input. Prepare your attachment input as mentioned below. Dictionary<string, string> attachment = new Dictionary<string, string>(); attachment.Add("YourFileName1.Extension", "Base64EncodedChunkData1"); attachment.Add("YourFileName2.Extension", "Base64EncodedChunkData2"); This will send an email with attachment/s from your SendinBlue account. */
using System;
using System.Collections.Generic;
using mailinblue;
namespace SendinblueTest {
  class Program {
    static void Main(string[] args) {
      API sendinBlue = new mailinblue.API("your access key");
      Dictionary < string, Object > data = new Dictionary < string, Object > ();
      Dictionary < string, string > to = new Dictionary < string, string > ();
      to.Add("to@example.net", "to whom!");
      List < string > from_name = new List < string > ();
      from_name.Add("from@email.com");
      from_name.Add("from email!");
      Dictionary < string, string > cc = new Dictionary < string, string > ();
      cc.Add("cc@example.net", "cc whom!");
      Dictionary < string, string > bcc = new Dictionary < string, string > ();
      bcc.Add("bcc@example.net", "bcc whom!");
      List < string > replyto = new List < string > ();
      replyto.Add("replyto@email.com");
      replyto.Add("reply to!");
      Dictionary < string, string > attachment = new Dictionary < string, string > ();
      attachment.Add("myfilename.pdf", "your_pdf_files_base64_encoded_chunk_data");
      Dictionary < string, string > inline_image = new Dictionary < string, string > ();
      inline_image.Add("myinlineimage1.png", "your_png_files_base64_encoded_chunk_data");
      inline_image.Add("myinlineimage2.jpg", "your_jpg_files_base64_encoded_chunk_data");
      Dictionary < string, string > headers = new Dictionary < string, string > ();
      headers.Add("Content-Type", "text/html; charset=iso-8859-1");
      headers.Add("X-param1", "value1");
      headers.Add("X-param2", "value2");
      headers.Add("X-Mailin-custom", "my custom value");
      headers.Add("X-Mailin-IP", "102.102.1.2");
      headers.Add("X-Mailin-Tag", "My tag");
      data.Add("to", to);
      data.Add("cc", cc);
      data.Add("bcc", bcc);
      data.Add("replyto", replyto);
      data.Add("from", from_name);
      data.Add("subject", "My subject");
      data.Add("html", "This is the <h1>HTML</h1><br/> This is inline image 1.<br/> <img src=\"{myinlineimage1.png}\" alt=\"image1\" border=\"0\"><br/> Some text<br/> This is inline image 2.<br/> <img src=\"{myinlineimage2.jpg}\" alt=\"image2\" border=\"0\"><br/> Some more text<br/> Re-used inline image 1.<br/> <img src=\"{myinlineimage1.png}\" alt=\"image3\" border=\"0\">");
      data.Add("text", "This is text");
      data.Add("attachment", attachment);
      data.Add("headers", headers);
      data.Add("inline_image", inline_image);
      Object sendEmail = sendinBlue.send_email(data);
      Console.WriteLine(sendEmail);
    }
  }
}