How to sort a List for multiple fields -- looking for a perfect syntex pls

Hi,

Can someone pls tell me how can I sort this class with multiple columns?

Request to give me code with a working syntex pls,

Here is my class and method to call it, can you tell me how can I retrieve result sorted by FamilyName, GroupName, subGroupName fields?  

Method to get it as list : 

List<MyClass > lstPriceBook = new List<MyClass>();
...