using Azure.Identity;

using System;

using System.Threading.Tasks;

using Microsoft.Graph;

using Microsoft.Graph.Models;

using Microsoft.Identity.Client;

using System.Collections.Generic;

​

namespace GraphAPI

{

    class Program

    {

        static async Task Main(string[] args)

        {

            try

            {

                var scopes = new string[] { "https://graph.microsoft.com/.default" };

​

                // Multi-tenant apps can use "common",

                // single-tenant apps must use the tenant ID from the Azure portal

                var tenantId = "c85d8295-dabe-494a-b067-faabc2e2dc2c";

​

                // Values from app registration

                var clientId = "e3bdf28a-fee2-44fe-a414-e8e7d94fab60";

                var clientSecret = "R8S8Q~cOKB-5Bg61oc0TaYEfkMxI8Dc~SvweDdzE";

​

                // using Azure.Identity;

                var options = new TokenCredentialOptions

                {

                    AuthorityHost = AzureAuthorityHosts.AzurePublicCloud

                };

​

                // https://learn.microsoft.com/dotnet/api/azure.identity.clientsecretcredential

                var clientSecretCredential = new ClientSecretCredential(

                    tenantId, clientId, clientSecret, options);

​

                var graphClient = new GraphServiceClient(clientSecretCredential, scopes);

                var userEmail = "t.morita@capitol.hawaii.gov";

​

                var app = ConfidentialClientApplicationBuilder.Create(clientId)

                    .WithClientSecret(clientSecret)

                    .WithAuthority($"https://login.microsoftonline.com/{tenantId}")

                    .Build();

​

​

                var authResult = await app.AcquireTokenForClient(scopes).ExecuteAsync();

​

                var newEvent = new Event

                {

                    Subject = "Meeting with John",

                    Start = new DateTimeTimeZone

                    {

                        DateTime = "2023-04-15T10:00:00",

                        TimeZone = "Pacific/Honolulu"

                    },

                    End = new DateTimeTimeZone

                    {

                        DateTime = "2023-04-15T11:00:00",

                        TimeZone = "Pacific/Honolulu"

                    },

                    Attendees = new List<Attendee>

                    {

                        new Attendee

                        {

                            EmailAddress = new EmailAddress

                            {

                                Address = "t.morita@capitol.hawaii.gov",

                                Name = "Travis Morita",

                            },                      

                            Type = AttendeeType.Required,

                        },

                        new Attendee

                        {

                            EmailAddress = new EmailAddress

                            {

                                Address = "j.horiuchi@capitol.hawaii.gov",

                                Name = "Joshu Horiuchi",

                            },                      

                            Type = AttendeeType.Optional,

                        },

                        new Attendee

                        {

                            EmailAddress = new EmailAddress

                            {

                                Address = "r.miyashiro@capitol.hawaii.gov",

                                Name = "Reed Miyashiro",

                            },                      

                            Type = AttendeeType.Optional,

                        },

                    }

                };

​

               var createdEvent = await graphClient.Users[userEmail].Calendar.Events

                    .PostAsync(newEvent);

​

               Console.WriteLine($"Event created with ID: {createdEvent.Id}");

            }

            catch (Exception ex) 

            {

                Console.WriteLine(ex);

            }       

        }

    }

}