using System;

using System.Threading.Tasks;

using RestSharp;

​

class ChatGPTChatbot

{

    private const string ApiKey = "your_openai_api_key_here"; // Replace with your API key

    private const string Endpoint = "https://api.openai.com/v1/chat/completions";

​

    public static async Task Main(string[] args)

    {

        Console.WriteLine("Chatbot: Hello! Ask me anything. Type 'exit' to end the conversation.");

        while (true)

        {

            Console.Write("You: ");

            string userInput = Console.ReadLine();

​

            if (userInput?.ToLower() == "exit")

            {

                Console.WriteLine("Chatbot: Goodbye!");

                break;

            }

​

            string response = await GetChatGPTResponse(userInput);

            Console.WriteLine($"Chatbot: {response}");

        }

    }

​

    private static async Task<string> GetChatGPTResponse(string userInput)

    {

        var client = new RestClient(Endpoint);

        var request = new RestRequest(Method.POST);

​

        request.AddHeader("Authorization", $"Bearer {ApiKey}");

        request.AddHeader("Content-Type", "application/json");

​

        // Request payload

        var requestBody = new

        {

            model = "gpt-3.5-turbo",

            messages = new[]

            {

                new { role = "system", content = "You are a helpful assistant." },

                new { role = "user", content = userInput }

            }

        };

​

        request.AddJsonBody(requestBody);

​

        var response = await client.ExecuteAsync(request);

​

        if (response.IsSuccessful)

        {

            // Parse the response to extract the chatbot's reply

            var responseObject = System.Text.Json.JsonDocument.Parse(response.Content);

            return responseObject.RootElement.GetProperty("choices")[0].GetProperty("message").GetProperty("content").GetString();

        }

​

        return "I'm sorry, I couldn't process your request.";

    }

}

​