using System;

using RestSharp;

using RestSharp.Serialization.Json;

using RestSharp.Serializers.SystemTextJson;

public class Program

{

    public static void Main()

    {

        BaseClient.SetBaseUrl("https://whateverkronosurlis");

        TokenRequest tokenRequest = new TokenRequest("someuser", "somepassword", "mycompany", "apikey");

        BaseClient.SetToken(tokenRequest.Post());

        EmployeeRequest request = new EmployeeRequest("23050823");

        Employee myEmployee = request.Get();

    }

}

​

public abstract class BaseClient {

    protected static string BaseUrl = null;

    protected static string Token = null;

    public static void SetBaseUrl(string url) {

        BaseUrl = url;

    }

    public static void SetToken(string token) {

        Token = token;  

    }

}

​

public class TokenRequest : BaseClient<string> {

    public override string URL {

        get {

            return "/v1/token"; 

        }

    }

    public override bool RequiresToken {

        get {

            return false;   

        }

    }

    private readonly string _apiKey;

    private readonly TokenAuth _tokenInfo;

    public TokenRequest(string username, string password, string company, string apiKey) {

        _tokenInfo = new TokenAuth {

            UserName = username,

            Password = password,

            Company = company

        };

        _apiKey = apiKey;

    }

    protected override void AddHeaders(IRestRequest request) {

        request.AddHeader("Accept", "text/json");

        request.AddHeader("Api-Key", _apiKey);

    }

    protected override void AddContent(IRestRequest request) {

        request.AddJsonBody(_tokenInfo) 

    }

}

​

public class TokenAuth {

    public string UserName {get; set;}

    public string Password {get;set;}

    public string Company {get;set;}

}

​

public abstract class BaseClient<T> : BaseClient where T: class {

    private readonly RestClient _restClient;

    public abstract string URL { get; }

    public virtual bool RequiresToken { get { return true; } }

    public BaseClient() {

        _restClient = new RestClient(BaseUrl);

        _restClient.UseSystemTextJson();

    }

    public IRestResponse Execute(Method method) {

        RestRequest request = new RestRequest(URL, DataFormat.Json);

        if(RequiresToken) {

            request.AddHeader("BEARER", Token);

        }

        AddHeaders(request);

        AddContent(request);

        return _restClient.Execute(request, method);

    }

    public T Get() {

        IRestResponse response = Execute(Method.GET);

        return _restClient.Deserialize<T>(response).Data;

    }

    public T Post() {

        IRestResponse response = Execute(Method.POST);

        return _restClient.Deserialize<T>(response).Data;

    }

    protected virtual void AddHeaders(IRestRequest request) {

    }

    protected virtual void AddContent(IRestRequest request) {

    }

}

​

​

public class EmployeeRequest : BaseClient<Employee> {

    private readonly string _employeeId;

    public override string URL {

        get {

            return $"/employee/{_employeeId}";

        }

    }

    public EmployeeRequest(string employeeId) {

        _employeeId = employeeId;   

    }

}

​

public class Employee {

    public string Name { get; set;} 

}