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Module 07 of 09 · C# From Beginner to Advanced

LINQ

Describe what data you want instead of writing loops to gather it, and understand when the query actually runs.

8 of 8 lessons available

Lessons in this module

  1. 01

    Why LINQ Exists

    Intermediate

    Replace hand-written loops with a declarative description of the result you want.

    17 min
  2. 02

    Filtering with Where

    Intermediate

    Select the items that satisfy a condition.

    18 min
  3. 03

    Projection with Select

    Intermediate

    Transform each item into a different shape.

    18 min
  4. 04

    Sorting

    Intermediate

    Order results by one or several keys.

    15 min
  5. 05

    Grouping

    Intermediate

    Gather items by a key and summarise each group.

    18 min
  6. 06

    Joining

    Intermediate

    Combine two sequences on a matching key.

    17 min
  7. 07

    Aggregation

    Intermediate

    Reduce a sequence to a single value with Count, Sum, Min, Max and Average.

    17 min
  8. 08

    Deferred Execution, IEnumerable and IQueryable

    Intermediate

    Explain when a query actually runs, and why this matters enormously with a database.

    22 min

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