---
id: object/codeunit/3034
type: object
title: Codeunit 3034 "DotNet_Stream"
summary: Codeunit 3034 "DotNet_Stream" in Base Application (System.IO). 17 public procedures. Present since at least BC23, still in BC30, changed in BC28.
tier: official
language: en
tags:
  - codeunit
  - base application
versions:
  introduced: null
  last_changed: "28"
  deprecated: null
review:
  state: derived
  by: null
  at: null
  flags: []
generated:
  at: "2026-10-11T00:31:51.816Z"
  pipeline: 0.2.0
  prompts: {}
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evidence:
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    url: https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Modules/System/DotNetWrappers/DotNetStream.Codeunit.al
    title: src/Layers/W1/BaseApp/Modules/System/DotNetWrappers/DotNetStream.Codeunit.al (releases/29.x)
    date: null
    commit: ea08af5ef2d6a9b5c5af4a029288abbe2c883220
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object_type: codeunit
object_id: 3034
name: DotNet_Stream
namespace: System.IO
app: Base Application
extends: null
first_version: "23"
last_version: "30"
present_in:
  - "23"
  - "24"
  - "25"
  - "26"
  - "27"
  - "28"
  - "29"
  - "30"
changed_in:
  - "28"
source_major: "29"
obsolete: null
countries: []
ms_search_form_ids: []
counts:
  fields: 0
  procedures: 17
  events: 0
  subscribers: 0
relations:
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  referenced_by: 0
  pages: 0
  extended_by: 0
  event_subscribers: 0
  calls: 2
  called_by: 3
  implements: 0
---

# Codeunit 3034 "DotNet_Stream"

> Codeunit 3034 "DotNet_Stream" in Base Application (System.IO). 17 public procedures. Present since at least BC23, still in BC30, changed in BC28.

Base Application · System.IO · BC23-30 · [source at ea08af5e](https://github.com/microsoft/BCApps/blob/ea08af5ef2d6a9b5c5af4a029288abbe2c883220/src/Layers/W1/BaseApp/Modules/System/DotNetWrappers/DotNetStream.Codeunit.al) · facts from BC29

## Procedures

- `FromInStream(InputStream: InStream)`
- `FromOutStream(OutputStream: OutStream)`
- `IsDotNetNull(): Boolean`
- `Close()`
- `Dispose()`
- `CanSeek(): Boolean`
- `CanRead(): Boolean`
- `CanWrite(): Boolean`
- `Length(): BigInteger`
- `Position(): BigInteger`
- `ReadByte(): Integer`
- `WriteByte(Value: Integer)`
- `Seek(Offset: Integer; var DotNet_SeekOrigin: Codeunit DotNet_SeekOrigin): BigInteger`
- `Read(var DotNet_Array: Codeunit DotNet_Array; Offset: Integer; Count: Integer): Integer`
- `Write(var DotNet_Array: Codeunit DotNet_Array; Offset: Integer; Count: Integer)`
- `GetStream(var CurrentDotNetStream: DotNet Stream)`
- `SetStream(NewDotNetStream: DotNet Stream)`

## Triggers

OnRun

## Calls

From the extracted call graph of BC29 (graphify-al on the snapshot checkout): calls whose target is known from a declared type or an `Object::"Name"` argument. Interface dispatch and calls through events are not counted, so the list is not complete.

- [Codeunit 3000 "DotNet_Array"](../codeunit/3000.md) (2 calls: `Read → GetArray`, `Write → GetArray`)
- [Codeunit 3039 "DotNet_SeekOrigin"](../codeunit/3039.md) (1 call: `Seek → GetSeekOrigin`)

## Called by

- [Codeunit 3032 "DotNet_BinaryReader"](../codeunit/3032.md) (3 calls: `BaseStream → SetStream`, `BinaryReader → GetStream`, `BinaryReaderWithEncoding → GetStream`)
- [Codeunit 3033 "DotNet_BinaryWriter"](../codeunit/3033.md) (3 calls: `BaseStream → SetStream`, `BinaryWriter → GetStream`, `BinaryWriterWithEncoding → GetStream`)
- [Codeunit 3009 "DotNet_MemoryStream"](../codeunit/3009.md) (1 call: `GetDotNetStream → SetStream`)

## Across versions

- Present in: BC23-30
- Changed (declaration) in: BC28

Source: AL metadata extracted from the code (names, ids, signatures, properties); no code bodies (D10).

## Ask your agent

Procedure bodies are not stored here (D10). The call sections above are our own, per object, from the BC29 call graph. For a procedure body or the calls of one procedure, ask bc-code-atlas (external, by Stefan Maron, MIT; default corpus w1-28), which the bc-observatory plugin connects: `bcatlas_resolve_node(object_type: "codeunit", object_name: "DotNet_Stream")`, then `bcatlas_get_procedure_body` or `bcatlas_get_neighbors` on the returned id.