ArrowDb 1.6.0

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 
dotnet add package ArrowDb --version 1.6.0
                    


                    

                
NuGet\Install-Package ArrowDb -Version 1.6.0
This command is intended to be used within the Package Manager Console in Visual Studio, as it uses the NuGet module's version of Install-Package. 
<PackageReference Include="ArrowDb" Version="1.6.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="ArrowDb" Version="1.6.0" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="ArrowDb" />
                    


                            Project file
For projects that support Central Package Management (CPM), copy this XML node into the solution Directory.Packages.props file to version the package. 
paket add ArrowDb --version 1.6.0
                    


                    

                
#r "nuget: ArrowDb, 1.6.0"
#r directive can be used in F# Interactive and Polyglot Notebooks. Copy this into the interactive tool or source code of the script to reference the package. 
#:package ArrowDb@1.6.0
#:package directive can be used in C# file-based apps starting in .NET 10 preview 4. Copy this into a .cs file before any lines of code to reference the package. 
#addin nuget:?package=ArrowDb&version=1.6.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=ArrowDb&version=1.6.0
                    


                            Install as a Cake Tool

ArrowDb

A fast, lightweight, and type-safe key-value database designed for .NET.

  • Super-Lightweight (dll size is ~19KB - approximately 9X smaller than UltraLiteDb)
  • Ultra-Fast (1,000,000 random operations / ~98ms on M2 MacBook Pro)
  • Minimal-Allocation (constant ~520 bytes for serialization of any db size)
  • Thread-Safe and Concurrent
  • ACID compliant on transaction level
  • Type-Safe (no reflection - compile-time enforced via source-generated JsonSerializerContext)
  • Cross-Platform and Fully AOT-compatible
  • Super-Easy API near mirroring of Dictionary<TKey, TValue>

A Note on null Values

ArrowDb enforces a "no nulls" policy by design. Attempting to Upsert a null value will be rejected and return false. This simplifies the developer experience by guaranteeing that if a key exists, its value is never null. This eliminates the need for null-checking after retrieval, leading to cleaner and more predictable application code.

This policy does not affect value types (structs); their default values (e.g., 0 for an int) are considered valid.

Information on usage can be found in the README.

Concurrency note: GetOrAddAsync

GetOrAddAsync is intentionally not atomic. Under concurrency, the factory may be invoked multiple times for the same key, and the final stored value is last-writer-wins (because the value is persisted via Upsert). If you need single-invocation semantics for the factory (e.g. side-effects/expensive work), guard the call site with a keyed lock.

Product Compatible and additional computed target framework versions.
.NET net9.0 is compatible.  net9.0-android was computed.  net9.0-browser was computed.  net9.0-ios was computed.  net9.0-maccatalyst was computed.  net9.0-macos was computed.  net9.0-tvos was computed.  net9.0-windows was computed.  net10.0 is compatible.  net10.0-android was computed.  net10.0-browser was computed.  net10.0-ios was computed.  net10.0-maccatalyst was computed.  net10.0-macos was computed.  net10.0-tvos was computed.  net10.0-windows was computed. 
Compatible target framework(s)
Included target framework(s) (in package)
Learn more about Target Frameworks and .NET Standard.

  • net10.0

    • No dependencies.

  • net9.0

    • No dependencies.

NuGet packages

This package is not used by any NuGet packages.

GitHub repositories

This package is not used by any popular GitHub repositories.

Version Downloads Last Updated
1.6.0 109 12/21/2025
1.5.0 583 7/23/2025
1.5.0-rc.1 528 7/23/2025
1.4.0 228 3/13/2025
1.3.0 157 2/21/2025
1.2.0 166 2/2/2025
1.1.0 144 1/26/2025
1.0.0 133 1/19/2025