apache/arrow-dotnet

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Official .NET implementation of Apache Arrow

Stars: 40
Forks: 30
Open beginner issues: 1
Indexed issues: 34
Avg merge: 1d 6h
Merged PRs (30d): 13

Dominant language: C#
License: Apache-2.0
Last GitHub push: Sep 14, 2026
Latest indexed: Sep 14, 2026
Contributing guide: Contributing guide
Code of conduct: Code of conduct
Beginner labels: No beginner labels indexed

Beginner friendly Everything

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PrimitiveArray<T>.Values typically fails with ArgumentOutOfRangeException Open

Difficulty 1/5 1-3 hours Newbie friendliness 88/100

apache/arrow-dotnet#410 · 4 comments · Opened Aug 12, 2026
IPC `ArrowFileWriter` can produce entirely zero-filled encapsulated messages Open

Difficulty 4/5 3-5 days Newbie friendliness 38/100

apache/arrow-dotnet#409 · Opened Aug 12, 2026
Variant shredding has no array-level entry points: every consumer re-writes the same VariantArray loops Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow-dotnet#399 · Opened Jul 31, 2026
Variant shredding cannot express a SQL-null row: the shred pipeline has no validity Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

apache/arrow-dotnet#398 · Opened Jul 31, 2026
ArrowBuffer spans do not keep native memory alive: NativeMemoryManager's finalizer can free a buffer while a Span over it is in use Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow-dotnet#397 · 2 comments · Opened Jul 27, 2026
Enhance TimeStampArray to support IANA/Olson TZ strings Open

Difficulty 3/5 1-2 days Newbie friendliness 55/100

apache/arrow-dotnet#378 · Opened Jun 22, 2026
Add compute kernels (Sum/Min/Max/Mean) using System.Numerics.Tensors (TensorPrimitives) and Tensor<T> support Open

Difficulty 5/5 Over a week Newbie friendliness 32/100

apache/arrow-dotnet#375 · 1 comment · Opened Jun 19, 2026
BitUtility.cs performance enhancement Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#361 · Opened May 19, 2026
Add support System.Buffers.IBufferWriter<T> Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#341 · 7 comments · Opened Apr 28, 2026
Consider shipping a managed allocator Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-dotnet#267 · Opened Feb 19, 2026
Consider batching calls to GC.AddMemoryPressure Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#261 · 2 comments · Opened Feb 15, 2026
A few starter generic compute kernels Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-dotnet#254 · 1 comment · 1 reaction · Opened Feb 2, 2026
Add a new TimeUnit for dotnet ticks Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-dotnet#246 · 1 comment · Opened Jan 22, 2026
Support large arrays Open

Difficulty 5/5 Over a week Newbie friendliness 20/100

apache/arrow-dotnet#187 · 1 comment · Opened Nov 18, 2025
How to serialize POCOs to a Table? Open

Difficulty 5/5 Over a week Newbie friendliness 35/100

apache/arrow-dotnet#186 · Opened Nov 18, 2025
Expose method to compare two batches or arrays Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow-dotnet#183 · Opened Nov 18, 2025
Support additional data types Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#182 · 3 comments · 1 reaction · Opened Nov 18, 2025
API improvements for Arrow arrays Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-dotnet#181 · Opened Nov 18, 2025
Add support for sending and receiving dictionary arrays via Flight Open

Difficulty 4/5 3-5 days Newbie friendliness 42/100

apache/arrow-dotnet#180 · Opened Nov 18, 2025
read_feather() fails with IOError: Invalid IPC message: negative bodyLength on batches larger than 2 GB Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#179 · Opened Nov 18, 2025
Improve performance of column lookup by name Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#178 · Opened Nov 18, 2025
Consider supporting Acero compute via GLib Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-dotnet#177 · Opened Nov 18, 2025
Python interop tests failing in CI Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-dotnet#151 · 1 comment · Opened Oct 27, 2025
Use System.Runtime.InteropServices.NativeMemory on modern .NET Open

Difficulty 4/5 3-5 days Newbie friendliness 48/100

apache/arrow-dotnet#99 · 1 comment · Opened Oct 1, 2025
The construction of arrays should be more flexible Open

Difficulty 5/5 Over a week Newbie friendliness 25/100

apache/arrow-dotnet#97 · 2 comments · Opened Sep 30, 2025
Decimal encoding performance improvement Open

Difficulty 5/5 Over a week Newbie friendliness 30/100

apache/arrow-dotnet#96 · 3 comments · Opened Sep 30, 2025
Update NuGet packages metadata Open

Difficulty 2/5 1-3 hours Newbie friendliness 50/100

apache/arrow-dotnet#79 · Opened Sep 22, 2025
NativeMemoryAllocator doesn't remove all memory pressure Open

Difficulty 2/5 1-3 hours Newbie friendliness 45/100

apache/arrow-dotnet#50 · 1 comment · Opened Sep 12, 2025
NuGet packages miss README Open

Difficulty 3/5 1-2 days Newbie friendliness 45/100

apache/arrow-dotnet#45 · Opened Sep 12, 2025
Release a new version from apache/arrow-dotnet Open

Difficulty 4/5 3-5 days Newbie friendliness 25/100

apache/arrow-dotnet#34 · 9 comments · Opened Sep 8, 2025
Transfer the C# related open issues in apache/arrow to apache/arrow-dotnet Open

Difficulty 3/5 1-2 days Newbie friendliness 35/100

apache/arrow-dotnet#32 · 4 comments · Opened Sep 5, 2025
Link docs from Arrow implementations page Open

Difficulty 2/5 1-3 hours Newbie friendliness 55/100

apache/arrow-dotnet#29 · 1 comment · Opened Sep 1, 2025
Add fuzzing to test suite Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#21 · 1 comment · Opened Aug 25, 2025
Reconsider bundling FlatBuffers Open

Difficulty 4/5 3-5 days Newbie friendliness 35/100

apache/arrow-dotnet#18 · 5 comments · Opened Aug 25, 2025

apache/arrow-dotnet

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