Channel.Create

Learn to create channels with Channel.CreateBounded and CreateUnbounded.

Channel.Create

Channel<T> builds an asynchronous queue between a producer and a consumer. Channel.CreateUnbounded<T>() makes an unbounded channel, Channel.CreateBounded<T>(capacity) a fixed-capacity one.

A channel has two sides: the Writer for the producer and the Reader for the consumer. This split keeps pipeline architecture clean. Channels live under System.Threading.Channels.

Bounded channel and capacity

A bounded channel blocks writes in a controlled way once the capacity is full. Channel.CreateBounded<int>(5) opens a five-item buffer. A sixth write waits until an item is consumed.

This gives backpressure that balances a fast producer against a slow consumer. The channel's Writer and Reader properties provide this control.

Exercise Create both channel kinds

Create an unbounded string channel named unbounded and a bounded int channel with capacity 5 named bounded. Print a confirmation line for each.

Show example solution

var unbounded = Channel.CreateUnbounded<string>(); var bounded = Channel.CreateBounded<int>(5); Console.WriteLine("unbounded created"); Console.WriteLine("bounded capacity 5");
Example solution:
using System;
using System.Threading.Channels;

class Program
{
    static void Main()
    {
        var unbounded = Channel.CreateUnbounded<string>();
        var bounded = Channel.CreateBounded<int>(5);
        Console.WriteLine("unbounded created");
        Console.WriteLine("bounded capacity 5");
    }
}

Test yourself

Which method creates an unbounded channel?
- Channel.CreateUnbounded<T>()
- Channel.New<T>()
- Channel.Open<T>()
- Channel.Make<T>()
Show answer

Channel.CreateUnbounded<T>() — Correct. CreateUnbounded makes an unbounded channel.

Complete the CreateUnbounded call

var channel = Channel.____;

Show answer

var channel = Channel.CreateUnbounded<string>();

Match each channel factory

CreateUnbounded<T>()

Unbounded channel
CreateBounded<T>(n)

Bounded channel (n items)
Channel<T>

Base channel type

Next lesson: ChannelWriter

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