Polecat 5.36.0

.NET 9.0 This package targets .NET 9.0. The package is compatible with this framework or higher. 
dotnet add package Polecat --version 5.36.0
                    


                    

                
NuGet\Install-Package Polecat -Version 5.36.0
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.
For projects that support PackageReference, copy this XML node into the project file to reference the package. 

                    


                            Directory.Packages.props
                        

                    

                

                    


                            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 5.36.0
                    


                    

                
#r "nuget: Polecat, 5.36.0"
#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 Polecat@5.36.0
#: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=Polecat&version=5.36.0
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=Polecat&version=5.36.0
                    


                            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(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
5.36.0 42 10/5/2026
5.35.0 475 10/2/2026
5.34.0 140 9/30/2026
5.33.1 585 9/29/2026
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5.31.0 1,668 9/23/2026
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5.28.1 549 9/13/2026
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5.23.0 966 9/4/2026
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5.21.1 719 9/2/2026
5.21.0 177 8/30/2026
5.20.0 756 8/26/2026
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