public static RequestHeader CreateDefault()
        {
            var header = new RequestHeader();
            header.MethodVersion = 1;
            header.Version = "WindowsRT V1.0";
            header.Ttl = 1800;
            header.Timestamp = DateTime.UtcNow;

            return header;
        }
        public static RequestHeader CreateDefault()
        {
            var header = new RequestHeader();
            header.MethodVersion = 1;
            header.Version = HealthVaultClient.Version;
            header.Ttl = 1800;
            header.Timestamp = DateTime.UtcNow;

            return header;
        }