FileCodeGroup
Grants permission to manipulate files located in the code assemblies to code assemblies that match the membership condition. This class cannot be inherited.
                using System.Security.Permissions;
namespace System.Security.Policy
{
    public sealed class FileCodeGroup : CodeGroup
    {
        public override string AttributeString => null;
        public override string MergeLogic => null;
        public override string PermissionSetName => null;
        public FileCodeGroup(IMembershipCondition membershipCondition, FileIOPermissionAccess access)
            : base(null, null)
        {
        }
        public override CodeGroup Copy()
        {
            return null;
        }
        protected override void CreateXml(SecurityElement element, PolicyLevel level)
        {
        }
        public override bool Equals(object o)
        {
            return base.Equals(o);
        }
        public override int GetHashCode()
        {
            return base.GetHashCode();
        }
        protected override void ParseXml(SecurityElement e, PolicyLevel level)
        {
        }
        public override PolicyStatement Resolve(Evidence evidence)
        {
            return null;
        }
        public override CodeGroup ResolveMatchingCodeGroups(Evidence evidence)
        {
            return null;
        }
    }
}