DelegateDecompiler.EntityFrameworkCore 0.32.0

.NET Standard 2.0
dotnet add package DelegateDecompiler.EntityFrameworkCore --version 0.32.0
NuGet\Install-Package DelegateDecompiler.EntityFrameworkCore -Version 0.32.0
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="DelegateDecompiler.EntityFrameworkCore" Version="0.32.0" />
For projects that support PackageReference, copy this XML node into the project file to reference the package.
paket add DelegateDecompiler.EntityFrameworkCore --version 0.32.0
#r "nuget: DelegateDecompiler.EntityFrameworkCore, 0.32.0"
#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 DelegateDecompiler.EntityFrameworkCore as a Cake Addin
#addin nuget:?package=DelegateDecompiler.EntityFrameworkCore&version=0.32.0

// Install DelegateDecompiler.EntityFrameworkCore as a Cake Tool
#tool nuget:?package=DelegateDecompiler.EntityFrameworkCore&version=0.32.0

DelegateDecompiler celebrates 10th year anniversary 🎂

A library that is able to decompile a delegate or a method body to their lambda representation


If you like the library please consider supporting my work.


Using computed properties in linq.

Asume we have a class with a computed property

class Employee
    public string FullName => FirstName + " " + LastName;

    public string LastName { get; set; }

    public string FirstName { get; set; }

And you are going to query employees by their full names

var employees = (from employee in db.Employees
                 where employee.FullName == "Test User"
                 select employee).Decompile().ToList();

When you call .Decompile method it decompiles your computed properties to their underlying representation and the query will become simmilar to the following query

var employees = (from employee in db.Employees
                 where (employee.FirstName + " " + employee.LastName)  == "Test User"
                 select employee).ToList();

If your class doesn't have a [Computed] attribute, you can use the .Computed() extension method..

var employees = (from employee in db.Employees
                 where employee.FullName.Computed() == "Test User"
                 select employee).ToList();

Also, you can call methods that return a single item (Any, Count, First, Single, etc) as well as other methods in identical way like this:

bool exists = db.Employees.Decompile().Any(employee => employee.FullName == "Test User");

Again, the FullName property will be decompiled:

bool exists = db.Employees.Any(employee => (employee.FirstName + " " + employee.LastName) == "Test User");

Using with EntityFramework and other ORMs

If you are using ORM specific features, like EF's Include, AsNoTracking or NH's Fetch then Decompile method should be called after all ORM specific methods, otherwise it may not work. Ideally use Decompile extension method just before materialization methods such as ToList, ToArray, First, FirstOrDefault, Count, Any, and etc.

Async Support with EntityFramework 6

The DelegateDecompiler.EntityFramework package provides DecompileAsync extension method which adds support for EF's Async operations.

Async Support with EntityFramework Core 2.0-3.1

The DelegateDecompiler.EntityFrameworkCore package provides DecompileAsync extension method which adds support for EF's Async operations.

Async Support with EntityFramework Core 5.0 and later

The DelegateDecompiler.EntityFrameworkCore5 package provides DecompileAsync extension method which adds support for EF's Async operations.


Available on NuGet


MIT license -

Product Versions
.NET net5.0 net5.0-windows net6.0 net6.0-android net6.0-ios net6.0-maccatalyst net6.0-macos net6.0-tvos net6.0-windows net7.0 net7.0-android net7.0-ios net7.0-maccatalyst net7.0-macos net7.0-tvos net7.0-windows
.NET Core netcoreapp2.0 netcoreapp2.1 netcoreapp2.2 netcoreapp3.0 netcoreapp3.1
.NET Standard netstandard2.0 netstandard2.1
.NET Framework net461 net462 net463 net47 net471 net472 net48 net481
MonoAndroid monoandroid
MonoMac monomac
MonoTouch monotouch
Tizen tizen40 tizen60
Xamarin.iOS xamarinios
Xamarin.Mac xamarinmac
Xamarin.TVOS xamarintvos
Xamarin.WatchOS xamarinwatchos
Compatible target framework(s)
Additional computed target framework(s)
Learn more about Target Frameworks and .NET Standard.

NuGet packages (3)

Showing the top 3 NuGet packages that depend on DelegateDecompiler.EntityFrameworkCore:

Package Downloads

Package Description


Extensions for querying EF Core with AutoMapper projections.


Package Description

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Version Downloads Last updated
0.32.0 528 10/20/2022
0.31.0 252 10/17/2022
0.31.0-artifacts.30 55 10/17/2022
0.31.0-alpha.2 51 10/17/2022
0.31.0-alpha.1 53 10/17/2022
0.30.0 2,743 12/14/2021
0.29.1 13,664 2/4/2021
0.29.0 296 2/4/2021
0.28.3 1,440 1/9/2021
0.28.2 2,254 11/12/2020
0.28.1 317 11/12/2020
0.28.0 113,778 10/31/2019
0.27.0 1,732 9/30/2019
0.26.1 451 9/30/2019
0.25.0 20,875 1/2/2019
0.24.0 35,353 4/28/2018