X509ChainPolicy Class

using System;
using System.Security.Cryptography;
using System.Security.Cryptography.X509Certificates;
using System.IO;

class TestX509Chain
{
	static void Main(string[] args)
	{
		//Create new X509 store from local certificate store.
		X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
		store.Open(OpenFlags.OpenExistingOnly | OpenFlags.ReadWrite);

		//Output store information.
		Console.WriteLine ("Store Information");
		Console.WriteLine ("Number of certificates in the store: {0}", store.Certificates.Count);
		Console.WriteLine ("Store location: {0}", store.Location);
		Console.WriteLine ("Store name: {0} {1}", store.Name, Environment.NewLine);
	
		//Put certificates from the store into a collection so user can select one.
		X509Certificate2Collection fcollection = (X509Certificate2Collection)store.Certificates;
		X509Certificate2Collection collection = X509Certificate2UI.SelectFromCollection(fcollection, "Select an X509 Certificate", "Choose a certificate to examine.", X509SelectionFlag.SingleSelection);
		X509Certificate2 certificate = collection[0];
		X509Certificate2UI.DisplayCertificate(certificate);
		//Output chain information of the selected certificate.
		X509Chain ch = new X509Chain();
		ch.Build (certificate);
		Console.WriteLine ("Chain Information");
		ch.ChainPolicy.RevocationMode = X509RevocationMode.Online;
		Console.WriteLine ("Chain revocation flag: {0}", ch.ChainPolicy.RevocationFlag);
		Console.WriteLine ("Chain revocation mode: {0}", ch.ChainPolicy.RevocationMode);
		Console.WriteLine ("Chain verification flag: {0}", ch.ChainPolicy.VerificationFlags);
		Console.WriteLine ("Chain verification time: {0}", ch.ChainPolicy.VerificationTime);
		Console.WriteLine ("Chain status length: {0}", ch.ChainStatus.Length);
		Console.WriteLine ("Chain application policy count: {0}", ch.ChainPolicy.ApplicationPolicy.Count);
		Console.WriteLine ("Chain certificate policy count: {0} {1}", ch.ChainPolicy.CertificatePolicy.Count, Environment.NewLine);
		//Output chain element information.
		Console.WriteLine ("Chain Element Information");
		Console.WriteLine ("Number of chain elements: {0}", ch.ChainElements.Count);
		Console.WriteLine ("Chain elements synchronized? {0} {1}", ch.ChainElements.IsSynchronized, Environment.NewLine);
	
		foreach (X509ChainElement element in ch.ChainElements)
		{
			Console.WriteLine ("Element issuer name: {0}", element.Certificate.Issuer);
			Console.WriteLine ("Element certificate valid until: {0}", element.Certificate.NotAfter);
			Console.WriteLine ("Element certificate is valid: {0}", element.Certificate.Verify ());
			Console.WriteLine ("Element error status length: {0}", element.ChainElementStatus.Length);
			Console.WriteLine ("Element information: {0}", element.Information);
			Console.WriteLine ("Number of element extensions: {0}{1}", element.Certificate.Extensions.Count, Environment.NewLine);

			if (ch.ChainStatus.Length > 1)
			{
				for (int index = 0; index < element.ChainElementStatus.Length; index++)
				{
					Console.WriteLine (element.ChainElementStatus[index].Status);
					Console.WriteLine (element.ChainElementStatus[index].StatusInformation);
				}
			}
		}
		store.Close();
	}
}