public sealed class PublisherMembershipCondition : IMembershipCondition, System.Security.ISecurityEncodable, 
        System.Security.ISecurityPolicyEncodable, IConstantMembershipCondition {
// Public Constructors
   public PublisherMembershipCondition(System.Security.Cryptography.X509Certificates.X509Certificate certificate);
// Public Instance Properties
   public X509Certificate Certificate{set; get; }
// Public Instance Methods
   public bool Check(Evidence evidence);
// implements IMembershipCondition
   public IMembershipCondition Copy(  );   
// implements IMembershipCondition
   public override bool Equals(object o);        
// overrides object
   public void FromXml(System.Security.SecurityElement e);
// implements System.Security.ISecurityEncodable
   public void FromXml(System.Security.SecurityElement e, PolicyLevel level);
 // implements System.Security.ISecurityPolicyEncodable
   public override int GetHashCode(  );    
// overrides object
   public override string ToString(  );    
// overrides object
   public SecurityElement ToXml(  );       
// implements System.Security.ISecurityEncodable
   public SecurityElement ToXml(PolicyLevel level);       
// implements System.Security.ISecurityPolicyEncodable
}

The PublisherMembershipCondition class uses the X.509v3 certificate contained in Publisher evidence to determine if an assembly or application domain qualifies for membership to a CodeGroup. The Certificate property contains the System.Security.Cryptography.X509Certificates.X509Certificate object against which the PublisherMembershipCondition object tests.

When policy resolution calls the Check( ) method, the PublisherMembershipCondition tests the Evidence collection provided to ensure that it contains a Publisher object. If so, the PublisherMembershipCondition object compares its Certificate property with the Publisher.Certificate property to determine if it grants CodeGroup membership.