Database.cs Error

public double ReadDouble(string Section, string Key)
        {
            string section = "[" + Section + "]";
            IniSectionStructure ISS = null;
            Sections.TryGetValue(section, out ISS);
            if (ISS != null)
            {
                IniValueStructure IVS = null;
                ISS.Variables.TryGetValue(Key, out IVS);
                if (IVS != null)
                    [COLOR="Red"]return double.Parse(IVS.Value);[/COLOR]
            }
            return 0;
        }