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Open Method
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X509Store::Open Method

Opens an X.509 certificate store or creates a new store, depending on OpenFlags flag settings.

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

void Open(
	OpenFlags flags


Type: System.Security.Cryptography.X509Certificates::OpenFlags

A bitwise combination of enumeration values that specifies the way to open the X.509 certificate store.


The store is unreadable.


The caller does not have the required permission.


The store contains invalid values.

Use this method to open an existing X.509 store. Note that you must have additional permissions, specified by StorePermissionFlags, to enumerate the certificates in the store. You can create a new store by passing a store name that does not exist to the class constructor, and then using any of the OpenFlags flags except OpenExistingOnly.

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.

#using <System.dll>
#using <System.Security.dll>

using namespace System;
using namespace System::Security::Cryptography;
using namespace System::Security::Cryptography::X509Certificates;
using namespace System::IO;
int main()

   //Create new X509 store called teststore from the local certificate store.
   X509Store ^ store = gcnew X509Store( "teststore",StoreLocation::CurrentUser );
   store->Open( OpenFlags::ReadWrite );
   X509Certificate2 ^ certificate = gcnew X509Certificate2;

   //Create certificates from certificate files. 
   //You must put in a valid path to three certificates in the following constructors.
   X509Certificate2 ^ certificate1 = gcnew X509Certificate2( "c:\\mycerts\\*****.cer" );
   X509Certificate2 ^ certificate2 = gcnew X509Certificate2( "c:\\mycerts\\*****.cer" );
   X509Certificate2 ^ certificate5 = gcnew X509Certificate2( "c:\\mycerts\\*****.cer" );

   //Create a collection and add two of the certificates.
   X509Certificate2Collection ^ collection = gcnew X509Certificate2Collection;
   collection->Add( certificate2 );
   collection->Add( certificate5 );

   //Add certificates to the store.
   store->Add( certificate1 );
   store->AddRange( collection );
   X509Certificate2Collection ^ storecollection = dynamic_cast<X509Certificate2Collection^>(store->Certificates);
   Console::WriteLine( "Store name: {0}", store->Name );
   Console::WriteLine( "Store location: {0}", store->Location );
   System::Collections::IEnumerator^ myEnum = storecollection->GetEnumerator();
   while ( myEnum->MoveNext() )
      X509Certificate2 ^ x509 = safe_cast<X509Certificate2 ^>(myEnum->Current);
      Console::WriteLine( "certificate name: {0}", x509->Subject );

   //Remove a certificate.
   store->Remove( certificate1 );
   X509Certificate2Collection ^ storecollection2 = dynamic_cast<X509Certificate2Collection^>(store->Certificates);
   Console::WriteLine( "{1}Store name: {0}", store->Name, Environment::NewLine );
   System::Collections::IEnumerator^ myEnum1 = storecollection2->GetEnumerator();
   while ( myEnum1->MoveNext() )
      X509Certificate2 ^ x509 = safe_cast<X509Certificate2 ^>(myEnum1->Current);
      Console::WriteLine( "certificate name: {0}", x509->Subject );

   //Remove a range of certificates.
   store->RemoveRange( collection );
   X509Certificate2Collection ^ storecollection3 = dynamic_cast<X509Certificate2Collection^>(store->Certificates);
   Console::WriteLine( "{1}Store name: {0}", store->Name, Environment::NewLine );
   if ( storecollection3->Count == 0 )
      Console::WriteLine( "Store contains no certificates." );
      System::Collections::IEnumerator^ myEnum2 = storecollection3->GetEnumerator();
      while ( myEnum2->MoveNext() )
         X509Certificate2 ^ x509 = safe_cast<X509Certificate2 ^>(myEnum2->Current);
         Console::WriteLine( "certificate name: {0}", x509->Subject );

   //Close the store.

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

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