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Continuing our examination of building LINQ expressions, let’s dive further into generic methods that can build expressions for any enumerable list of objects. In part one, I showed how to build a simple string expression, but we can make this much more robust.

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Using LINQ’s FluentAPI, left/outer joins are difficult. With a little work, it’s possible to perform left outer joins, though.

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There are a few scenarios, especially when using partitioning/windowing T-SQL functions, that EF falls down a bit. It also is not entirely straight forward to perform somewhat complex joins and aggregation.

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I’ve said it before, and it bears repeating. LINQ is one of those features in .NET that keeps me using it. In-line queries that allow you to expressively search lists, with the declarative query syntax, is very appealing. Sure, under the covers, it’s performing the heavy lifting, iteration, and such, but the SQL-like lambda expressions are incredibly powerful.

However, sometimes we need something even more dynamic.

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