private static string GetFullName(VpnNode vpnNode)
        {
            if (string.IsNullOrWhiteSpace(vpnNode.ServerRepresentation))
            {
                return(string.Empty);
            }

            var isoName   = CountriesResourceManager.GetString(vpnNode.ServerRepresentation.ToUpperInvariant(), CultureInfo.InvariantCulture);
            var finalName = string.IsNullOrEmpty(isoName) ? vpnNode.ServerRepresentation : isoName;

            return(finalName);
        }
        /// <summary>
        /// The to vpn country.
        /// </summary>
        /// <param name="vpnNode">
        /// The server vpnNode model.
        /// </param>
        /// <returns>
        /// The <see cref="VpnNodeModel"/>.
        /// </returns>
        /// <exception cref="ArgumentNullException" >rises ArgumentNullException.</exception>
        public static VpnNodeModel ToVpnNodeModel(VpnNode vpnNode)
        {
            if (vpnNode == null)
            {
                throw new ArgumentNullException(nameof(vpnNode));
            }

            var fullName = GetFullName(vpnNode);

            return(new VpnNodeModel
            {
                ServerModel = vpnNode,
                DisplayName = fullName,
            });
        }