How to return all values of a column as null except one column value in LINQ?

I want to return only one column value and other column values as null from database. how can i do that in LINQ? also have to make values of not nullable fields to null w开发者_如何学编程hile retrieving

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C#

var results = from item in db.items
              select (item.col1 == value ? item.col1 : null);

VB.NET

Dim results = From item in db.items
              Select iif(item.col1 == value ? item1.col : Nothing)