Oid 类

参考地址：https://docs.microsoft.com/zh-cn/dotnet/api/system.security.cryptography.oid?redirectedfrom=MSDN&view=netframework-4.8

标题：Oid 类

表示加密对象标识符。 此类不能被继承。

using System;

using System.Security.Cryptography;

public class OidSample

{

    public static void Main()

    {

        // Assign values to strings.

        string Value1 = "1.2.840.113549.1.1.1";

        string Name1 = "3DES";

        string Value2 = "1.3.6.1.4.1.311.20.2";

        string InvalidName = "This name is not a valid name";

        string InvalidValue = "1.1.1.1.1.1.1.1";

        // Create new Oid objects using the specified values.

        // Note that the corresponding Value or Friendly Name property is automatically added to the object.

        Oid o1 = new Oid(Value1);

        Oid o2 = new Oid(Name1);

        // Create a new Oid object using the specified Value and Friendly Name properties.

        // Note that the two are not compared to determine if the Value is associated

        //  with the Friendly Name.

        Oid o3 = new Oid(Value2, InvalidName);

        //Create a new Oid object using the specified Value. Note that if the value

        //  is invalid or not known, no value is assigned to the Friendly Name property.

        Oid o4 = new Oid(InvalidValue);

        //Write out the property information of the Oid objects.

        Console.WriteLine("Oid1: Automatically assigned Friendly Name: {0}, {1}", o1.FriendlyName, o1.Value);

        Console.WriteLine("Oid2: Automatically assigned Value: {0}, {1}", o2.FriendlyName, o2.Value);

        Console.WriteLine("Oid3: Name and Value not compared: {0}, {1}", o3.FriendlyName, o3.Value);

        Console.WriteLine("Oid4: Invalid Value used: {0}, {1} {2}", o4.FriendlyName, o4.Value, Environment.NewLine);

        //Create an Oid collection and add several Oid objects.

        OidCollection oc = new OidCollection();

        oc.Add(o1);

        oc.Add(o2);

        oc.Add(o3);

        Console.WriteLine("Number of Oids in the collection: {0}", oc.Count);

        Console.WriteLine("Is synchronized: {0} {1}", oc.IsSynchronized, Environment.NewLine);

        //Create an enumerator for moving through the collection.

        OidEnumerator oe = oc.GetEnumerator();

        //You must execute a MoveNext() to get to the first item in the collection.

        oe.MoveNext();

        // Write out Oids in the collection.

        Console.WriteLine("First Oid in collection: {0},{1}", oe.Current.FriendlyName,oe.Current.Value);

        oe.MoveNext();

        Console.WriteLine("Second Oid in collection: {0},{1}", oe.Current.FriendlyName, oe.Current.Value);

        //Return index in the collection to the beginning.

        oe.Reset();

    }

}

OID value:1.3.14.3.2.26     sha1