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X509Store.Remove Method

Removes a certificate from an X.509 certificate store.

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

'Declaration
Public Sub Remove ( _
	certificate As X509Certificate2 _
)
'Usage
Dim instance As X509Store
Dim certificate As X509Certificate2

instance.Remove(certificate)
public void Remove (
	X509Certificate2 certificate
)
public function Remove (
	certificate : X509Certificate2
)
Not applicable.

Parameters

certificate

The certificate to remove.

Exception typeCondition

ArgumentNullException

certificate is a null reference (Nothing in Visual Basic).

SecurityException

The caller does not have the required permission.

Use this method to remove a single certificate from an X.509 store.

The following code example opens an X.509 certificate store, adds and deletes certificates, and then closes the store. It assumes that you have three certificates to add to and remove from a local store.

Imports System
Imports System.Security.Cryptography
Imports System.Security.Cryptography.X509Certificates
Imports System.IO



Class X509store2

    Shared Sub Main(ByVal args() As String)
        'Create new X509 store called teststore from the local certificate store.
        Dim store As New X509Store("teststore", StoreLocation.CurrentUser)
        store.Open(OpenFlags.ReadWrite)
        Dim certificate As New X509Certificate2()

        'Create certificates from certificate files.
        'You must put in a valid path to three certificates in the following constructors.
        Dim certificate1 As New X509Certificate2("c:\mycerts\*****.cer")
        Dim certificate2 As New X509Certificate2("c:\mycerts\*****.cer")
        Dim certificate5 As New X509Certificate2("c:\mycerts\*****.cer")

        'Create a collection and add two of the certificates.
        Dim collection As New X509Certificate2Collection()
        collection.Add(certificate2)
        collection.Add(certificate5)

        'Add certificates to the store.
        store.Add(certificate1)
        store.AddRange(collection)

        Dim storecollection As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
        Console.WriteLine("Store name: {0}", store.Name)
        Console.WriteLine("Store location: {0}", store.Location)
        Dim x509 As X509Certificate2
        For Each x509 In storecollection
            Console.WriteLine("certificate name: {0}", x509.Subject)
        Next x509

        'Remove a certificate.
        store.Remove(certificate1)
        Dim storecollection2 As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
        Console.WriteLine("{1}Store name: {0}", store.Name, Environment.NewLine)
        Dim x509a As X509Certificate2
        For Each x509a In storecollection2
            Console.WriteLine("certificate name: {0}", x509a.Subject)
        Next x509a

        'Remove a range of certificates.
        store.RemoveRange(collection)
        Dim storecollection3 As X509Certificate2Collection = CType(store.Certificates, X509Certificate2Collection)
        Console.WriteLine("{1}Store name: {0}", store.Name, Environment.NewLine)
        If storecollection3.Count = 0 Then
            Console.WriteLine("Store contains no certificates.")
        Else
            Dim x509b As X509Certificate2
            For Each x509b In storecollection3
                Console.WriteLine("certificate name: {0}", x509b.Subject)
            Next x509b
        End If

        'Close the store.
        store.Close()

    End Sub
End Class

import System.*;
import System.Security.Cryptography.*;
import System.Security.Cryptography.X509Certificates.*;
import System.IO.*;

public class X509store2
{
    public static void main(String[] args)
    {
        // Create new X509 store called teststore from the local 
        // certificate store.
        X509Store store = new X509Store("teststore", StoreLocation.CurrentUser);
        store.Open(OpenFlags.ReadWrite);
        X509Certificate2 certificate = new X509Certificate2();
        //Create certificates from certificate files.
        // You must put in a valid path to three certificates in the following 
        // constructors.
        X509Certificate2 certificate1 = new X509Certificate2(
            "c:\\mycerts\\*****.cer");
        X509Certificate2 certificate2 = new X509Certificate2(
            "c:\\mycerts\\*****.cer");
        X509Certificate2 certificate5 = new X509Certificate2(
            "c:\\mycerts\\*****.cer");
        //Create a collection and add two of the certificates.
        X509Certificate2Collection collection = 
            new X509Certificate2Collection();
        collection.Add(certificate2);
        collection.Add(certificate5);
        //Add certificates to the store.
        store.Add(certificate1);
        store.AddRange(collection);

        X509Certificate2Collection storecollection = 
            (X509Certificate2Collection)store.get_Certificates();
        Console.WriteLine("Store name: {0}", store.get_Name());
        Console.WriteLine("Store location: {0}", store.get_Location());
        for (int iCtr = 0; iCtr < storecollection.get_Count(); iCtr++) {
            X509Certificate2 x509 = storecollection.get_Item(iCtr);
            Console.WriteLine("certificate name: {0}", x509.get_Subject());
        }
        //Remove a certificate.
        store.Remove(certificate1);
        X509Certificate2Collection storecollection2 = 
            (X509Certificate2Collection)store.get_Certificates();
        Console.WriteLine("{1}Store name: {0}", store.get_Name(),
            Environment.get_NewLine());
        for (int iCtr = 0; iCtr < storecollection2.get_Count(); iCtr++) {
            X509Certificate2 x509 = storecollection2.get_Item(iCtr);
            Console.WriteLine("certificate name: {0}", x509.get_Subject());
        }
        //Remove a range of certificates.
        store.RemoveRange(collection);
        X509Certificate2Collection storecollection3 =
            (X509Certificate2Collection)store.get_Certificates();
        Console.WriteLine("{1}Store name: {0}", store.get_Name(), 
            Environment.get_NewLine());
        if (storecollection3.get_Count() == 0) {
            Console.WriteLine("Store contains no certificates.");
        }
        else {
            for (int iCtr = 0; iCtr < storecollection3.get_Count(); iCtr++) {
                X509Certificate2 x509 = storecollection3.get_Item(iCtr);
                Console.WriteLine("certificate name: {0}", x509.get_Subject());
            }
        }
        //Close the store.
        store.Close();
    } //main
} //X509store2

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

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