LINQ Explained - Index

For your convenience, I am adding the following index of my on going series on Language Integrated Query or LINQ.

LINQ Explained - 1: Introduction to LINQ
LINQ Explained - 2: Features used by LINQ
LINQ Explained - 3: Some more features used by LINQ
LINQ Explained - 4: LINQ Syntax
LINQ Explained - 5: LINQ to SQL
LINQ Explained - 6: LINQ to Objects
LINQ Explained - 7: LINQ to XML