How to make a payment gateway from square.com in my c# mvc p

Question

I want to add payment gateway from square.com in my c# mvc project. I already tried lots of things from google but unable to find proper solution.

Here is my controller code I already tried

public ActionResult Squre()

{

_transactionApi = new TransactionApi();

var client = new RestSharp.RestClient();

var request = new RestSharp.RestRequest("https://connect.squareup.com/v1/me/payments", RestSharp.Method.GET);

request.RequestFormat = RestSharp.DataFormat.Json;

request.AddHeader("Authorization", "Bearer sq0atp-zHuWWPD4ds9J6YoVlEoYZg");

setHeaders(request);

var Response = client.Execute(request);

HttpWebResponse response = null;

string responseMessage = null;

response = (HttpWebResponse)request.GetResponse();

if (response.StatusCode == HttpStatusCode.OK)

{

using (Stream stream = response.GetResponseStream())

{

using (StreamReader reader = new StreamReader(stream))

{

responseMessage = reader.ReadToEnd();

}

}

}

return View();

}

namespaces i have used mentioned below here

using System.Runtime.Serialization.Json;

using Square.Connect.Api;

using Square.Connect.Model

I want to make a payment gateway from square in my site. i need full tutorial for this can anyone help me please. What should i do??

Which things i have to modified in my code. Can anyone modify my code please or please give me the proper code