AoMBrgEditor.PssgFile.AddAttribute C# (CSharp) Method

        public PssgAttribute AddAttribute(PssgNode parentNode, int attributeID, object data)
        {
            if (parentNode == null)
            {
                return null;
            }
            if (parentNode.attributes == null)
            {
                parentNode.attributes = new Dictionary<string, PssgAttribute>();
            }
            else if (parentNode.HasAttribute(attributeID))
            {
                parentNode[attributeID].data = data;
                return parentNode[attributeID];
            }
            else if (parentNode.attributes.ContainsKey(attributeInfo[attributeID - 1].name))
            {
                return null;
            }
            PssgAttribute newAttr = new PssgAttribute(attributeID, data, this, parentNode);
            parentNode.attributes.Add(newAttr.Name, newAttr);
            return newAttr;
        }