Issues

• Support the proposed DictionaryEncoding.custom_metadata (format 1.6) for dictionaries of extension types in IPC

  apache/arrow-dotnet#475 · Filter by author CurtHagenlocher opened on Oct 18, 2026

• PrimitiveArray<T>.Values typically fails with ArgumentOutOfRangeException

  Bug

  apache/arrow-dotnet#410 · Filter by author twest822 opened on Aug 12, 2026
  4

• IPC ArrowFileWriter can produce entirely zero-filled encapsulated messages

  Bug

  apache/arrow-dotnet#409 · Filter by author bparks13 opened on Aug 12, 2026
  1

• ArrowBuffer spans do not keep native memory alive: NativeMemoryManager's finalizer can free a buffer while a Span over it is in use

  apache/arrow-dotnet#397 · Filter by author CurtHagenlocher opened on Jul 27, 2026
  2

• Enhance TimeStampArray to support IANA/Olson TZ strings

  Feature

  apache/arrow-dotnet#378 · Filter by author CurtHagenlocher opened on Jun 22, 2026

• Add compute kernels (Sum/Min/Max/Mean) using System.Numerics.Tensors (TensorPrimitives) and Tensor<T> support

  Feature

  apache/arrow-dotnet#375 · Filter by author luisquintanilla opened on Jun 19, 2026
  1

• BitUtility.cs performance enhancement

  Feature

  apache/arrow-dotnet#361 · Filter by author CurtHagenlocher opened on May 19, 2026

• Add support System.Buffers.IBufferWriter<T>

  Feature

  apache/arrow-dotnet#341 · Filter by author kronic opened on Apr 28, 2026
  7

• Consider shipping a managed allocator

  Feature

  apache/arrow-dotnet#267 · Filter by author CurtHagenlocher opened on Feb 19, 2026

• Consider batching calls to GC.AddMemoryPressure

  Feature

  apache/arrow-dotnet#261 · Filter by author CurtHagenlocher opened on Feb 15, 2026
  2

• A few starter generic compute kernels

  Feature

  apache/arrow-dotnet#254 · Filter by author mobiusklein opened on Feb 2, 2026
  1

• Add a new TimeUnit for dotnet ticks

  Feature

  apache/arrow-dotnet#246 · Filter by author adbugger opened on Jan 22, 2026
  1

• Support large arrays

  Feature

  apache/arrow-dotnet#187 · Filter by author CurtHagenlocher opened on Nov 18, 2025
  1

• How to serialize POCOs to a Table?

  Feature

  apache/arrow-dotnet#186 · Filter by author CurtHagenlocher opened on Nov 18, 2025

• Expose method to compare two batches or arrays

  Feature

  apache/arrow-dotnet#183 · Filter by author CurtHagenlocher opened on Nov 18, 2025

• Support additional data types

  Feature

  apache/arrow-dotnet#182 · Filter by author CurtHagenlocher opened on Nov 18, 2025
  3

• API improvements for Arrow arrays

  Feature

  apache/arrow-dotnet#181 · Filter by author CurtHagenlocher opened on Nov 18, 2025

• Add support for sending and receiving dictionary arrays via Flight

  Feature

  apache/arrow-dotnet#180 · Filter by author CurtHagenlocher opened on Nov 18, 2025

• read_feather() fails with IOError: Invalid IPC message: negative bodyLength on batches larger than 2 GB

  Bug

  apache/arrow-dotnet#179 · Filter by author CurtHagenlocher opened on Nov 18, 2025

• Improve performance of column lookup by name

  Feature

  apache/arrow-dotnet#178 · Filter by author CurtHagenlocher opened on Nov 18, 2025

• Consider supporting Acero compute via GLib

  Feature

  apache/arrow-dotnet#177 · Filter by author CurtHagenlocher opened on Nov 18, 2025

• Python interop tests failing in CI

  Bug

  apache/arrow-dotnet#151 · Filter by author CurtHagenlocher opened on Oct 27, 2025
  1

• Use System.Runtime.InteropServices.NativeMemory on modern .NET

  Feature

  apache/arrow-dotnet#99 · Filter by author CurtHagenlocher opened on Oct 1, 2025
  1

• The construction of arrays should be more flexible

  Feature

  apache/arrow-dotnet#97 · Filter by author CurtHagenlocher opened on Sep 30, 2025
  2

• Decimal encoding performance improvement

  Feature

  apache/arrow-dotnet#96 · Filter by author aik-jahoda opened on Sep 30, 2025
  3