Molecularweight

        private void Molvaegtberegner()
        {
            string input = ChemicalformulaTextbox.Text;

            string pattern = @"([A-Z][a-z]?\d*|[A-Z]?\d*)";

            string[] substrings = Regex.Split(input, pattern);

            foreach (string match in substrings)
            {
                if (match != "")
                {
                    //Calculate Molecularweight here
                }
            }
        }