using System;

using RestSharp;

public class Program {

    public void Main() {

        string result = connectAPI().Content.ToString();

        Console.WriteLine(result);

    }

​

    public class VsureInput {

        public string key {get;set;}

        public string document_type {get;set;}

        public string visachecktype {get;set;}

        public Visaholder visaholder{ get; set; }

    }

​

    public class Visaholder

    {

        public string country { get; set; }

        public string date_of_birth { get; set; }

        public string given_names { get; set; }

        public string family_name { get; set; }

        public string passport_id { get; set; }

    }

​

    public static IRestResponse connectAPI() { 

​

        RestClient client = new RestClient("https://api.vsure.com.au/v1/"); 

        RestRequest request = new RestRequest("visacheck",Method.POST);

​

        request.AddParameter("type", "json"); 

​

        var visaholderdata = new Visaholder{

            country = "India",

            date_of_birth = "1999-01-01",

            family_name = "Smith",

            given_names = "John",

            passport_id = "7777777",

        };

        var userRequest = new VsureInput{

            key = "<yourapikeyhere>",

            document_type = "passport",

            visachecktype = "study",

            visaholder = visaholderdata 

        }; // Create the object

​

        var serializer = new RestSharp.Serializers.JsonSerializer(); // Create serializer

        var requestContent = serializer.Serialize(userRequest); // Serializer the object into string

        request.AddParameter("json", requestContent); // Add the serialized string to the body content

​

        return client.Execute(request); 

    }

}