Hi Gokul,
You can create any number of Symbols as per your requirement by sub classing the Symbol class and adding your custom versions.
If your intention is to,not allow the child nodes being resized when you resize the parent Symbol node, then, the way to go with this would be by using the GetChildByName() method, which will return the childnode matching the given name and update its properties with your requirements .Similarly, you can group the symbol nodes and update the properties of the child nodes as well.
I have created a Sample implementing these features, please look into it and let me know if this helps you.
Regards,
Praveena.
CustomSymbols.zip