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Channels (System.Threading.Channels)

Last Updated: May 17, 2026

12 min read

A Channel<T> is an in-memory, thread-safe queue built for async producer-consumer code. One or more tasks write items into the channel, one or more tasks read them out, and the channel coordinates the handoff without locks in your code. This lesson covers how to create bounded and unbounded channels, the ChannelWriter<T> and ChannelReader<T> APIs, backpressure, multi-producer multi-consumer patterns, and when to pick Channel<T> over IAsyncEnumerable<T> or BlockingCollection<T>.

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