PM> Install-Package SCB.Open.API.Net -Version 0.2.0

SCBOpenAPI.Authentication auth = new SCBOpenAPI.Authentication();

auth.CreateAuthorizeRequestHeader.ApiKey = "<Your API Key>";
auth.CreateAuthorizeRequestHeader.ApiSecret = "<Your API Secret>";
auth.CreateAuthorizeRequestHeader.ResourceOwnerId = "<Your API Key>";
auth.CreateAuthorizeRequestHeader.RequestUId = Guid.NewGuid().ToString();
auth.CreateAuthorizeRequestHeader.ResponseChannel = "mobile";
auth.CreateAuthorizeRequestHeader.EndState = "mobile_web";
auth.CreateAuthorizeRequestHeader.AcceptLanguage = "EN";
auth.CreateAuthorizeRequestHeader.ApplicationId = null;
auth.CreateAuthorizeRequestHeader.RedirectOption = null;
auth.CreateAuthorizeRequestHeader.State = null;
auth.CreateAuthorizeRequestHeader.CodeChallenge = null;

var resultAuthorize = auth.GetAuthorize(auth.CreateAuthorizeRequestHeader);

Console.WriteLine(resultAuthorize.status.code);
// Display
// 1000

Console.WriteLine(resultAuthorize.status.description);
// Display
// Success

Console.WriteLine(resultAuthorize.data.callbackUrl);
// Display
// scbeasysim://login/a2f816bf-5e33-4a7b-a3fd-3babd1e95428

Console.WriteLine(resultAuthorize.jsonString);
// Display
// {
//   "status": {
//     "code": 1000,
//     "description": "Success"
//   },
//   "data": {
//     "callbackUrl": "scbeasysim://login/a2f816bf-5e33-4a7b-a3fd-3babd1e95428"
//   }
// }