constructor

public class Constructor
    {
        private Message CurrentMessage { get; }
        private Message Parent { get; set; }

        public Constructor(Message current) => CurrentMessage = current;

        public string GeneratorConstructor()
        {
            var toReturn = string.Empty;
            if (CurrentMessage.HasParent)
            {
                Parent = MessageGenerator.Messages.messages.FirstOrDefault(x => x.Name == CurrentMessage.Parent);
                toReturn = "";
                toReturn += $"public {CurrentMessage.Name} ({GetInitFields()}) : base({GetParentInitFields()})" +
                            $"\r\n{{" +
                            $"\r\n{GetFieldsToInit()}" +
                            $"\r\n}}";
                return toReturn;
            }
            toReturn += $"public {CurrentMessage.Name} ({GetInitFields()})" +
                        $"\r\n{{" +
                        $"\r\n{GetFieldsToInit()}" +
                        $"\r\n}}";
            return toReturn;
        }

        #region InitFields
        private string GetInitFields()
        {
            var toReturn = string.Empty;
            if (CurrentMessage.HasParent)
            {
                var totalLength = CurrentMessage.Fields.Count + Parent.Fields.Count;
                for (var i = 0; i < CurrentMessage.Fields.Count; i++)
                {
                    toReturn += CurrentMessage.Fields[i].GetInitFields();
                    if (i < totalLength - 1)
                        toReturn += ", ";
                }
                for (var i = 0; i < Parent.Fields.Count; i++)
                {
                    toReturn += Parent.Fields[i].GetInitFields();
                    if (i < Parent.Fields.Count - 1)
                        toReturn += ", ";
                }
                return toReturn;
            }
            var totalLengh = CurrentMessage.Fields.Count;
            for (var i = 0; i < totalLengh; i++)
            {
                toReturn += CurrentMessage.Fields[i].GetInitFields();
                if (i < totalLengh - 1)
                    toReturn += ", ";
            }
            return toReturn;
        }

        private string GetParentInitFields()
        {
            var toReturn = string.Empty;
            var totalLengh = Parent.Fields.Count;
            for (var i = 0; i < totalLengh; i++)
            {
                toReturn += Parent.Fields[i].GetInitFields();
                if (i < totalLengh - 1)
                    toReturn += ", ";
            }
            return toReturn;
        }
        #endregion

        #region FieldsToInit
        public string GetFieldsToInit() => CurrentMessage.Fields.Aggregate(string.Empty,
            (current, field) => current + field.GetFieldsToInit() + "\r\n");
        #endregion

    }