GacMembershipCondition.cs

using System.Runtime.InteropServices;
using System.Security.Util;

namespace System.Security.Policy
{
    [Serializable]
    [ComVisible(true)]
    public sealed class GacMembershipCondition : IMembershipCondition, ISecurityEncodable, ISecurityPolicyEncodable, IConstantMembershipCondition, IReportMatchMembershipCondition
    {
        public bool Check(Evidence evidence)
        {
            object usedEvidence = null;
            return ((IReportMatchMembershipCondition)this).Check(evidence, out usedEvidence);
        }

        bool IReportMatchMembershipCondition.Check(Evidence evidence, out object usedEvidence)
        {
            usedEvidence = null;
            if (evidence == null)
            {
                return false;
            }
            return evidence.GetHostEvidence<GacInstalled>() != null;
        }

        public IMembershipCondition Copy()
        {
            return new GacMembershipCondition();
        }

        public SecurityElement ToXml()
        {
            return ToXml(null);
        }

        public void FromXml(SecurityElement e)
        {
            FromXml(e, null);
        }

        public SecurityElement ToXml(PolicyLevel level)
        {
            SecurityElement securityElement = new SecurityElement("IMembershipCondition");
            XMLUtil.AddClassAttribute(securityElement, GetType(), GetType().FullName);
            securityElement.AddAttribute("version", "1");
            return securityElement;
        }

        public void FromXml(SecurityElement e, PolicyLevel level)
        {
            if (e == null)
            {
                throw new ArgumentNullException("e");
            }
            if (!e.Tag.Equals("IMembershipCondition"))
            {
                throw new ArgumentException(Environment.GetResourceString("Argument_MembershipConditionElement"));
            }
        }

        public override bool Equals(object o)
        {
            GacMembershipCondition gacMembershipCondition = o as GacMembershipCondition;
            if (gacMembershipCondition != null)
            {
                return true;
            }
            return false;
        }

        public override int GetHashCode()
        {
            return 0;
        }

        public override string ToString()
        {
            return Environment.GetResourceString("GAC_ToString");
        }
    }
}