CSharp_NoiseFloor.Process.calculateNoisFloor C# (CSharp) Method

        private string calculateNoisFloor(String values)
        {
            string result = "";

            string noSignalLevel = "";
            int index = values.IndexOf(";");
            noSignalLevel = values.Substring(0, index);
            noSignalLevel = noSignalLevel.Trim();
            double s1 = Double.Parse(noSignalLevel);

            string signalLevel = "";
            signalLevel = values.Substring(++index);
            signalLevel = signalLevel.Trim();
            double s2 = Double.Parse(signalLevel);

            double nf = s1 - (s2 - this.power);

            result = nf.ToString();

            return result;
        }