“system.text.json DeserializeAsync when to use” Code Answer

/// <Summary><br /> /// You should used JsonSerializer when you:<br /> ///<br /> /// Have a POCO that matches the JSON data, or it’s easy to create one.<br /> /// Need to use most of the properties of the JSON in your application code.<br /> /// </Summary</p> <p>var data = await JsonSerializer.DeserializeAsync<SomeObject>(req.Body);</p> <p>// It’s much neater to deserialize the request body this way, and it avoids the unnecessary string allocation, since the serializer consumes the stream for you.</p> <p>// The Deserialize method can also take a ReadOnlySpan of bytes as input. Much like the stream example above, you previously had to read the bytes into a string before deserializing it to JSON. Instead, if you’ve already got the data loaded in memory, this overload saves you a few allocations and parses the JSON directly into a POCO.</p> <p>// It’s also worth nothing that some of the default options for System.Text.Json are different from Json.NET. System.Text.Json adheres to RFC 8259, so if you’re ever left wondering why a setting is different from Newtonsoft, that’s probably why.