EntityFrameworkCore.MemoryJoin 0.8.0

There is a newer prerelease version of this package available.
See the version list below for details.
dotnet add package EntityFrameworkCore.MemoryJoin --version 0.8.0                
NuGet\Install-Package EntityFrameworkCore.MemoryJoin -Version 0.8.0                
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="EntityFrameworkCore.MemoryJoin" Version="0.8.0" />                
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add EntityFrameworkCore.MemoryJoin --version 0.8.0                
#r "nuget: EntityFrameworkCore.MemoryJoin, 0.8.0"                
#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.
// Install EntityFrameworkCore.MemoryJoin as a Cake Addin
#addin nuget:?package=EntityFrameworkCore.MemoryJoin&version=0.8.0

// Install EntityFrameworkCore.MemoryJoin as a Cake Tool
#tool nuget:?package=EntityFrameworkCore.MemoryJoin&version=0.8.0                


Extension for EntityFramework for joins to in-memory data. Both Entity Framework 6 and Entity Framework Core are supported! Used SQL standard syntax.

Tested with: MSSQL, PostgreSQL, and SQLite. (others should also work as standard EF API and SQL standard syntax are used)


  1. Internally MemoryJoin uses intermediate class for making queries. So you can either use your own or basically use built-in one. Like this:

    protected DbSet<EntityFramework.MemoryJoin.QueryModelClass> QueryData { get; set; }

    Or like this for EF Core

    protected DbSet<EntityFrameworkCore.MemoryJoin.QueryModelClass> QueryData { get; set; }

Please note this DbSet is protected, so it can't be used by anybody, only MemoryJoin will access it. Another note: table for QueryModelClass is NOT required. It is used for internal mapping only. So if you use migrations - basically use -IgnoreChanges flag.

  1. After DbSet is defined you can write as follows:

    using EntityFramework.MemoryJoin

    For EF Core:

    using EntityFrameworkCore.MemoryJoin


// get context
var context = CreateContext();

// define in-memory list
var queryData = new [] {
    new { .StreetName = "Foo", .HouseNumber = 33 },
    new { .StreetName = "Baz", .HouseNumber = 99 },
    // can specify other objects here

// get queryable representation, using thing like AsQueryable() will not work
var queryable = context.FromLocalList(queryData);

// Write as complex query as you want now. Data will be sent to server for performing query. I.e.
var efQuery = from addr in context.Addresses
              join el in queryList on
                       new { addr.StreetName, addr.HouseNumber } equals
                       new { el.StreetName, el.HouseNumber }
              select new
   // Query will be executed on DB server
   var = efQuery.ToList();
Product Compatible and additional computed target framework versions.
.NET net5.0 was computed.  net5.0-windows was computed.  net6.0 is compatible.  net6.0-android was computed.  net6.0-ios was computed.  net6.0-maccatalyst was computed.  net6.0-macos was computed.  net6.0-tvos was computed.  net6.0-windows was computed.  net7.0 was computed.  net7.0-android was computed.  net7.0-ios was computed.  net7.0-maccatalyst was computed.  net7.0-macos was computed.  net7.0-tvos was computed.  net7.0-windows was computed.  net8.0 was computed.  net8.0-android was computed.  net8.0-browser was computed.  net8.0-ios was computed.  net8.0-maccatalyst was computed.  net8.0-macos was computed.  net8.0-tvos was computed.  net8.0-windows was computed. 
.NET Core netcoreapp3.0 was computed.  netcoreapp3.1 was computed. 
.NET Standard netstandard2.1 is compatible. 
.NET Framework net45 is compatible.  net451 was computed.  net452 was computed.  net46 was computed.  net461 was computed.  net462 was computed.  net463 was computed.  net47 was computed.  net471 was computed.  net472 was computed.  net48 was computed.  net481 was computed. 
MonoAndroid monoandroid was computed. 
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Tizen tizen60 was computed. 
Xamarin.iOS xamarinios was computed. 
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Version Downloads Last updated
0.9.0-beta1 27,583 3/29/2023
0.8.1-beta1 304 2/20/2023
0.8.0 285,704 12/11/2021
0.7.6 82,795 4/2/2021
0.7.5 17,442 11/24/2020
0.7.0 37,111 4/18/2020
0.6.0 8,413 9/29/2019
0.5.7 8,393 8/15/2019
0.5.6 21,182 3/22/2019
0.5.5 606 3/18/2019
0.5.4 4,384 12/18/2018
0.5.3 44,756 4/6/2018
0.5.2 926 3/23/2018
0.5.1 920 3/22/2018
0.5.0 2,698 3/20/2018

.Net 6 supported