❔ How does ASP.NET deserialize JSON to records?

This isn't specifically related to ASP.NET, but still wondering. If I have an endpoint like this

private sealed record SendRequest(string Content);
private static Task<IResult> Send(
    [FromBody] SendRequest request)
{
    // ...
}

private sealed record SendRequest(string Content);
private static Task<IResult> Send(
    [FromBody] SendRequest request)
{
    // ...
}

then ASP.NET has no problem deserializing the body into the record. But... how does it do that? Just using System.Text.Json it doesn't appear like you can (or I'm doing something wrong), and plus, the properties that records generate don't have setters. How does this work?

C#•4y ago•

2 replies

Thinker

❔ How does ASP.NET deserialize JSON to records?

This isn't specifically related to ASP.NET, but still wondering. If I have an endpoint like this

private sealed record SendRequest(string Content);
private static Task<IResult> Send(
    [FromBody] SendRequest request)
{
    // ...
}

private sealed record SendRequest(string Content);
private static Task<IResult> Send(
    [FromBody] SendRequest request)
{
    // ...
}

❔ How does ASP.NET deserialize JSON to records?

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