Polecat 5.19.2

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 
dotnet add package Polecat --version 5.19.2
                    


                    

                
NuGet\Install-Package Polecat -Version 5.19.2
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="Polecat" Version="5.19.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="Polecat" Version="5.19.2" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="Polecat" />
                    


                            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 Polecat --version 5.19.2
                    


                    

                
#r "nuget: Polecat, 5.19.2"
#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 Polecat@5.19.2
#: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=Polecat&version=5.19.2
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Polecat&version=5.19.2
                    


                            Install as a Cake Tool

Polecat

SQL Server-backed event store and lightweight document database for the Critter Stack.

Polecat is "Marten for SQL Server" — the same API shape, on SQL Server 2025. It leans on the native json column type, and stores events, streams and documents in pc_-prefixed tables it manages for you.

Install

dotnet add package Polecat

Getting started

builder.Services.AddPolecat(opts =>
{
    opts.ConnectionString = connectionString;
    opts.DatabaseSchemaName = "myapp";
});

Then take a session and append events:

await using var session = store.LightweightSession();

var streamId = Guid.NewGuid();
session.Events.StartStream(streamId, new OrderPlaced(streamId, "Alice", 100m));
await session.SaveChangesAsync();

var events = await session.Events.FetchStreamAsync(streamId);

Documents work the same way:

session.Store(new Customer { Id = customerId, Name = "Alice" });
await session.SaveChangesAsync();

var customer = await session.LoadAsync<Customer>(customerId);

What's in the box

  • Event sourcing — streams keyed by Guid or string, live aggregation, snapshots
  • Projections — inline and async, single-stream, multi-stream, event, flat-table and composite
  • Async daemon — high water mark tracking, rebuilds, subscriptions
  • Document storage — LINQ querying, patching, bulk insert, soft deletes, optimistic concurrency
  • Multi-tenancy — conjoined (per-row) and separate-database, with optional table partitioning

Requirements

  • .NET 9 or .NET 10
  • SQL Server 2025 (the native json type is used for event data, document bodies and snapshots)
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.

NuGet packages (5)

Showing the top 5 NuGet packages that depend on Polecat:

Package Downloads
WolverineFx.Polecat

Polecat-backed Persistence for Wolverine Applications
Polecat.EntityFrameworkCore

EF Core integration for Polecat event store projections
Polecat.AspNetCore

Helpers for Polecat-backed AspNetCore applications
Polecat.Mcp

MCP (Model Context Protocol) server tools for Polecat event store introspection
CritterWatch.SqlServer

Turnkey CritterWatch monitoring console on SQL Server (Polecat). Option B: shares CritterWatch.Services source, swaps the store binding to Polecat. Ships AddCritterWatch(WebApplicationBuilder)/UseCritterWatch(WebApplication) host bootstrap and the embedded Vue SPA (pack with -p:EmbedFrontend=true), at parity with the Marten CritterWatch package.

GitHub repositories (1)

Showing the top 1 popular GitHub repositories that depend on Polecat:

Repository Stars
JasperFx/wolverine
Supercharged .NET server side development!
Version Downloads Last Updated
5.19.2 92 8/21/2026
5.19.1 169 8/20/2026
5.19.0 336 8/18/2026
5.18.0 159 8/18/2026
5.17.0 130 8/17/2026
5.16.0 143 8/16/2026
5.15.1 150 8/15/2026
5.15.0 114 8/15/2026
5.14.0 115 8/15/2026
5.13.0 119 8/14/2026
5.12.0 1,184 8/11/2026
5.11.0 335 8/8/2026
5.10.0 329 8/3/2026
5.9.1 310 7/31/2026
5.9.0 180 7/30/2026
5.8.0 163 7/30/2026
5.7.1 316 7/28/2026
5.7.0 2,941 7/26/2026
5.6.0 239 7/24/2026
5.5.0 738 7/22/2026
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