Kerbal Space Program

    public PartModule this[string className]
    {
        get
        {
            // Change this variable to whatever your private variable is obfiscated from
            List<PartModule> theList = null; 
            int hashCode = className.GetHashCode();
            for (int i = 0; i < theList.Count; i++)
            {
                PartModule partModule = theList[i];
                // DANGER! never compare hash codes without also comparing equality.
                // you can get strings that hash to the same value. 
                // Besides, native string comparison does this already so there's really no performance gain
                if (partModule.ClassName == className)
                    return partModule;
            }

            // This isn't your error, but you get the idea.
            Debug.LogError("Unable to get class " + className + " from PartModuleList");
            return null
        }
    }