/// <summary>
        /// It returns true if string is null or empty or just a white space otherwise it returns false.
        /// </summary>
        /// <param name="input">Input String</param>
        /// <returns>bool</returns>
        public static bool IsEmpty(this string input)
        {
            return string.IsNullOrEmpty(input) || string.IsNullOrWhiteSpace(input);
        }