不使用SharePointOnlineCredentials的Project Online CSOM

using System;
using System.Net.Http;
using System.Net.Http.Headers;
using System.Threading.Tasks;
using Microsoft.Identity.Client;
using Microsoft.ProjectServer.Client;
using Microsoft.SharePoint.Client;

class Program
{
    private static string clientId = "YOUR_CLIENT_ID";
    private static string clientSecret = "YOUR_CLIENT_SECRET";
    private static string tenantId = "YOUR_TENANT_ID";
    private static string projectOnlineUrl = "https://YOUR_TENANT.sharepoint.com/sites/YOUR_PROJECT_SITE";

    static async Task Main(string[] args)
    {
        string authority = $"https://login.microsoftonline.com/{tenantId}";
        string[] scopes = { $"{projectOnlineUrl}/.default" };

        IConfidentialClientApplication app = ConfidentialClientApplicationBuilder.Create(clientId)
            .WithClientSecret(clientSecret)
            .WithAuthority(new Uri(authority))
            .Build();

        AuthenticationResult result = await app.AcquireTokenForClient(scopes).ExecuteAsync();

        using (var context = new ProjectContext(projectOnlineUrl))
        {
            context.ExecutingWebRequest += (sender, e) =>
            {
                e.WebRequestExecutor.WebRequest.Headers.Authorization = new AuthenticationHeaderValue("Bearer", result.AccessToken);
            };

            context.Load(context.Projects);
            context.ExecuteQuery();

            foreach (PublishedProject project in context.Projects)
            {
                Console.WriteLine($"Project Name: {project.Name}");
            }
        }
    }
}

Install-Package Microsoft.Identity.Client
Install-Package Microsoft.ProjectServer.Client
Install-Package Microsoft.SharePoint.Client