Forex_Strategy_Builder.Indicator_Compilation_Manager.GetIndicatorInstanceFromAssembly C# (CSharp) Method

        static Indicator GetIndicatorInstanceFromAssembly(Assembly assembly, string indicatorFileName, out string errorMessage)
        {
            Type[] assemblyTypes = assembly.GetTypes();
            foreach (Type typeAssembly in assemblyTypes)
            {
                if(typeAssembly.IsSubclassOf(typeof(Indicator)))
                {
                    ConstructorInfo[] aConstructorInfo = typeAssembly.GetConstructors();

                    // Looking for an appropriate constructor
                    foreach (ConstructorInfo constructorInfo in aConstructorInfo)
                    {
                        ParameterInfo[] parameterInfo = constructorInfo.GetParameters();
                        if (constructorInfo.IsConstructor &&
                            constructorInfo.IsPublic      &&
                            parameterInfo.Length == 1     &&
                            parameterInfo[0].ParameterType == typeof(SlotTypes))
                        {
                            try
                            {
                                errorMessage = string.Empty;
                                return (Indicator)constructorInfo.Invoke(new object[] { SlotTypes.NotDefined });
                            }
                            catch (Exception exc)
                            {
                                errorMessage = "ERROR: [" + indicatorFileName + "] " + exc.Message;
                                if(!string.IsNullOrEmpty(exc.InnerException.Message))
                                    errorMessage += Environment.NewLine + "\t" + exc.InnerException.Message;
                                return null;
                            }

                        }
                    }

                    errorMessage = "ERROR: Cannot find an appropriate constructor for " + indicatorFileName + ".";
                    return null;
                }
            }

            errorMessage = "ERROR: Cannot create an instance of an indicator from " + assembly.ToString() + ".";
            return null;
        }