How to Use IDisposable with LINQ
Objects that implement IDisposable are everywhere. The interface even gets its own language features (C#, VB, F#). However, LINQ throws a few wrenches into things:
LINQ’s query syntax depends on expressions; using blocks are statements.
When querying a sequence of IDisposable objects, there’s no easy way to ensure disposal after each element has been consumed.
Returning deferred queries [...]
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