public static void Main()
{
        String pattern = "FL2 (77) Flashing,77,a=1.875,A=90.0,b=3.625,B=95.0,c=1.375,C=175.0,d=2.5,hem=0.5,16GA-AL,";
        string[] fParams = pattern.Split(',');
        Regex regex = new Regex("([a-zA-Z]=.*?)");

        for (int i = 0; i < fParams.Length; i++)
        {
            if (regex.IsMatch(fParams[i]))
            {
                Console.WriteLine("true " + fParams[i]);
                if (fParams[i].Any(char.IsUpper))
                {
                    Console.WriteLine("upper case", fParams[i]);
                    string[] param = fParams[i].Split('=');
                    // Note in actual program I do more complex calculations
                    Double value = Math.Round(Convert.ToDouble(param[1]));
                    pattern = pattern.Replace(fParams[i], param[0]+"="+Convert.ToString(value));
                }
                else
                {
                    Console.WriteLine("lower case", fParams[i]);
                    string[] param = fParams[i].Split('=');
                    // Note in actual program I do more complex calculations
                    Double value = Math.Round(Convert.ToDouble(param[1]) * 2) / 2;
                    pattern = pattern.Replace(fParams[i], param[0] + "=" + Convert.ToString(value));
                }

            }
        }

        //return pattern;
}