.NET 10 documentation for SerializeToUtf8Bytes

Question

.NET 10 documentation for SerializeToUtf8Bytes

Manica Moscon Advogados 5

Could you point me to an official reference that establishes what applies to .NET 10 for the System.Text.Json.JsonSerializer.SerializeToUtf8Bytes<TValue>(TValue, JsonSerializerOptions) overload? The specific statement I’d like to verify is that this overload returns a byte[] containing the JSON representation of the supplied value encoded in UTF-8.

In one retrieval of the Microsoft Learn URL requesting the .NET 10 view, the returned text included the section for this overload. The header listed System.Text.Json v11.0.0 and displayed a prerelease notice, and the section showed multiple signature variants. That left me unsure which parts of the returned section I could cite as applying to .NET 10. Microsoft Learn method reference

An official reference that supports only part of the return statement would be useful. If the reference also identifies which signature variant applies, please indicate the variant it supports. If the package header affects how the section should be read for this specific claim, a brief clarification on that point would help. The goal is to establish the scope of the documented return statement for this overload.

Manica Moscon Advogados 5 Reputation points

2026-11-12T18:25:19.9266667+00:00

Could you quote the exact moniker range that includes net-10.0 and point to the official documentation or markup showing which content it covers for SerializeToUtf8Bytes<TValue>(TValue, JsonSerializerOptions)?

I’m specifically trying to establish whether that evidence applies to the Returns statement describing the JSON representation encoded as UTF-8 bytes. If it supports only part of that statement, or only the signature, please indicate that scope.

1 answer

Your answer

Manica Moscon Advogados 5 Reputation points

2026-11-12T18:25:19.9266667+00:00

Could you quote the exact moniker range that includes net-10.0 and point to the official documentation or markup showing which content it covers for SerializeToUtf8Bytes<TValue>(TValue, JsonSerializerOptions)?

I’m specifically trying to establish whether that evidence applies to the Returns statement describing the JSON representation encoded as UTF-8 bytes. If it supports only part of that statement, or only the signature, please indicate that scope.

Answer 1

The official .NET 10 API reference directly supports the statement that SerializeToUtf8Bytes<TValue>(TValue, JsonSerializerOptions) returns a byte[] containing the value’s JSON representation encoded as UTF-8.^1^

Applicable .NET 10 contract

The relevant C# signature is:

public static byte[] SerializeToUtf8Bytes<TValue>(
    TValue value,
    JsonSerializerOptions? options = default);

On the view=net-10.0 page, the overload is identified as:

SerializeToUtf8Bytes<TValue>(TValue, JsonSerializerOptions)

Its description says that it converts the generically typed value into a JSON string encoded as UTF-8 bytes, and its Returns entry states:

A JSON string representation of the value, encoded as UTF-8 bytes.

Most importantly for version scope, the overload’s surrounding moniker range explicitly includes net-10.0. Therefore, both the overload and that return description are documented as applying to .NET 10.^1^

The general serialization guide independently confirms the operational part of the contract: to serialize to a UTF-8 byte array, call JsonSerializer.SerializeToUtf8Bytes.^2^

var value = new { Name = "Ada", Active = true };

byte[] jsonUtf8Bytes =
    JsonSerializer.SerializeToUtf8Bytes(value);

string json = Encoding.UTF8.GetString(jsonUtf8Bytes);
// {"Name":"Ada","Active":true}

Which displayed signature variant to cite

For C# on .NET 10, cite the nullable-options form:

public static byte[] SerializeToUtf8Bytes<TValue>(
    TValue value,
    JsonSerializerOptions? options = default);

The API page can display several declarations because one article aggregates supported target frameworks, languages, annotations, and API versions. Those alternatives should not be combined into a new signature. For the requested claim, the decisive elements are:

the generic overload taking TValue and JsonSerializerOptions;
its byte[] return type;
its return description;
the moniker range containing net-10.0.

Meaning of the `System.Text.Json v11.0.0` banner

The page-level Package: System.Text.Json v11.0.0 entry identifies package metadata represented on the aggregated API page; it does not cancel the overload-level net-10.0 applicability marker.

Microsoft distinguishes a NuGet package version from other library versions and states that a NuGet package version is used by NuGet and has no effect on runtime behavior.^3^ Consequently, the package banner and prerelease notice should not be used alone to establish the .NET 10 contract—but neither should they be read as excluding .NET 10 when the overload’s moniker explicitly includes net-10.0.

A concise citation-ready statement is:

In .NET 10, JsonSerializer.SerializeToUtf8Bytes<TValue>(TValue, JsonSerializerOptions?) returns a byte[] containing a JSON string representation of the supplied value encoded as UTF-8.^1^

References

.NET 10 documentation for SerializeToUtf8Bytes

1 answer

Applicable .NET 10 contract

Which displayed signature variant to cite

Meaning of the System.Text.Json v11.0.0 banner

Your answer

Meaning of the `System.Text.Json v11.0.0` banner