Not an Issue, a suggestion for a sample

[Ofer-Gal]

For a while, I tried to see how I could use this in my code in Azure functions where I can't use DeviceCodeProvider like:

IAuthenticationProvider ap = new DeviceCodeProvider(pca, scopes);

So instead I came up with

var clientApplication = ConfidentialClientApplicationBuilder
					.Create(azureAdOptions.ClientId)
					.WithTenantId(azureAdOptions.TenantId)
					.WithCertificate(getCertificate(azureAdOptions.CertificatePassword))
					.Build();
var SPauthenticationProvider = new ClientCredentialProvider(clientApplication, $"https://{sharepointDomain}/.default");

then 
GraphServiceClient spServiceClient = new GraphServiceClient(SPauthenticationProvider, hp);

This is using a certificate in the root directory like so:

private static X509Certificate2 getCertificate(string CertificatePassword)
		{
			try
			{
				var certPath = Path.Combine(System.IO.Directory.GetCurrentDirectory(), "ecgmcdev.pfx");
				var certfile = System.IO.File.OpenRead(certPath);
				var certificateBytes = new byte[certfile.Length];
				certfile.Read(certificateBytes, 0, (int)certfile.Length);
				var cert = new X509Certificate2(
					certificateBytes, CertificatePassword, //	HandleHooks.GetEnvironmentVariable("CertificatePassword"),
					X509KeyStorageFlags.Exportable |
					X509KeyStorageFlags.MachineKeySet |
					X509KeyStorageFlags.PersistKeySet);
				return cert;
			}catch	(Exception ex)
			{
				Console.WriteLine(ex.Message);
				return null;
			}
		}

If you think it is worth adding to the samples, please do.
Thank you for a great library

[pschaeflein]

There is a similar sample posted at https://cmatskas.com/create-a-net-core-deamon-app-that-calls-msgraph-with-a-certificate/

(I have yet to get @cmatskas to submit it, but I'll keep trying.)