X500DistinguishedNameFlags Enumeration

X500DistinguishedNameFlags Enumeration


Specifies characteristics of the X.500 distinguished name.

Namespace:   System.Security.Cryptography.X509Certificates
Assembly:  System (in System.dll)

public enum X500DistinguishedNameFlags

Member nameDescription

The distinguished name does not use the plus sign.


The distinguished name does not use quotation marks.


Forces the distinguished name to encode specific X.500 keys as UTF-8 strings rather than printable Unicode strings. For more information and the list of X.500 keys affected, see the X500NameFlags enumeration.


The distinguished name has no special characteristics.


The distinguished name is reversed.


The distinguished name uses commas.


The distinguished name uses the new line character.


The distinguished name uses semicolons.


The distinguished name uses T61 encoding.


The distinguished name uses UTF8 encoding instead of Unicode character encoding.

This enumeration is used with the X500DistinguishedNameFlags class to indicate special characters contained in the distinguished name.

Several values are mutually exclusive in this enumeration; use only one of these values to define the special characteristics of an X.500 distinguished name. For example, specify only one of the UseCommas, UseNewLines , and UseSemicolons values. You would also specify either UseT61Encoding or UseUTF8Encoding .

Legacy Code Example

The following code example shows how to use the X500DistinguishedNameFlags enumeration.

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

class X500Sample
	static void Main()
			X509Store store = new X509Store("MY", StoreLocation.CurrentUser);
			store.Open(OpenFlags.ReadOnly | OpenFlags.OpenExistingOnly);
			X509Certificate2Collection collection = (X509Certificate2Collection)store.Certificates;
			X509Certificate2Collection fcollection = (X509Certificate2Collection)collection.Find(X509FindType.FindByTimeValid, DateTime.Now, false);
			X509Certificate2Collection scollection = X509Certificate2UI.SelectFromCollection(fcollection, "Test Certificate Select", "Select a certificate from the following list to get information on that certificate", X509SelectionFlag.MultiSelection);
			Console.WriteLine("Number of certificates: {0}{1}", scollection.Count, Environment.NewLine);
			foreach (X509Certificate2 x509 in scollection)
				X500DistinguishedName dname = new X500DistinguishedName(x509.SubjectName);
				Console.WriteLine("X500DistinguishedName: {0}{1}", dname.Name, Environment.NewLine);
		catch (CryptographicException)
			Console.WriteLine("Information could not be written out for this certificate.");


.NET Framework
Available since 2.0
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