System.Security.Permissions.RegistryPermission.GetPathList C# (CSharp) Method

        public string GetPathList(RegistryPermissionAccess access)
        {
            return null;
        }

        /// <summary>Creates a permission that is the union of the current permission and the specified permission.</summary>
        /// <returns>A new permission that represents the union of the current permission and the specified permission.</returns>
        /// <param name="other">A permission to combine with the current permission. It must be of the same type as the current permission. </param>
        /// <exception cref="T:System.ArgumentException">The <paramref name="other" /> parameter is not null and is not of the same type as the current permission. </exception>
        public override IPermission Union(IPermission other)
        {
            RegistryPermission registryPermission = this.Cast(other);

            if (registryPermission == null)
            {
                return(this.Copy());
            }
            if (this.IsUnrestricted() || registryPermission.IsUnrestricted())
            {
                return(new RegistryPermission(PermissionState.Unrestricted));
            }
            if (this.IsEmpty() && registryPermission.IsEmpty())
            {
                return(null);
            }
            RegistryPermission registryPermission2 = (RegistryPermission)this.Copy();
            string             pathList            = registryPermission.GetPathList(RegistryPermissionAccess.Create);

            if (pathList != null)
            {
                registryPermission2.AddPathList(RegistryPermissionAccess.Create, pathList);
            }
            pathList = registryPermission.GetPathList(RegistryPermissionAccess.Read);
            if (pathList != null)
            {
                registryPermission2.AddPathList(RegistryPermissionAccess.Read, pathList);
            }
            pathList = registryPermission.GetPathList(RegistryPermissionAccess.Write);
            if (pathList != null)
            {
                registryPermission2.AddPathList(RegistryPermissionAccess.Write, pathList);
            }
            return(registryPermission2);
        }