SendAsync
SendAsync is an asynchronous API operation that sends a request or data and represents its completion and result asynchronously.
C# Concurrency: Asynchronous and multithreaded programming
SendAsync is an asynchronous socket operation that transfers data and represents completion with a task containing the accepted byte count.
- How it is used
- Uses asynchronous socket sending to serve concurrent connections without blocking a dedicated thread during each transfer.
- How deep it goes
- Defines task completion and accepted-byte semantics, then demonstrates SendAsync inside an asynchronous file-serving loop.
- Examples
- Uses an asynchronous TCP file server that sends one-megabyte buffer segments after reading them asynchronously.
- What you can do after
- Apply it via C# Socket APIs to asynchronously send buffer segments and inspect the accepted byte count.
Read how C# Concurrency: Asynchronous and multithreaded programming explains SendAsync →
ASP.NET Core in Action, 3e
SendAsync is the asynchronous HttpMessageHandler method that processes an HTTP request and returns its response.
- How it is used
- Uses SendAsync to implement cross-cutting HTTP behavior such as authentication, logging, metrics, and request retries.
- How deep it goes
- Explains overriding, request modification, pipeline forwarding, response inspection, registration, and handler ordering.
- Examples
- Demonstrates an API-key handler that adds a header before forwarding requests through a typed-client pipeline.
- What you can do after
- Apply it via DelegatingHandler to customize outgoing requests and process responses in an HttpClient pipeline.
Related concepts
- HttpMessageHandlerpart of · HttpMessageHandler is an abstract .NET component that processes HTTP request and response messages within an HttpClient handler chain.
- AcceptAsynccontrasts with · AcceptAsync is an asynchronous socket operation that returns a Task<Socket> completing when an incoming connection arrives.
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