C# data structures

Question

Do i have to worry/learn data structures if i m learning C#. I have subsribed to a program but they have not mentioned it in the syllabus.

Also isn't it CLR takes care of all memory managment/garbage collection.... maybe this is the reason programmers don't have to learn data structures for C#.

I m completely confused nd needs a detailed answer from a C# expert. Please no misdirection .. if you don't know don't mislead.