How Can I Insert Item List In Database Using Linq Lambda Expression Using Safe Way Like Trans And Rollback Concept

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LINQ

C#5.0

here i my window application,

i want to generate bill of customer item,
in my wpf form, i have 16 row for item like that...

Item_id | Item Name | Item Category | Quantity |
--------|--------------|------------------|----------|



When user input Item code, on textchange event "item name" and Its Category "Item categoty" are Print on label in its Column (its Complited) .
after that user will put Quantity as txtvalue in textbox.

question is how can we save in database using linq Lembda expression.
with using safe way like Trans and Rollback Concept

please help me..