GlitchedPolygons.DataTransferObject 1.0.3

Prefix Reserved

dotnet add package GlitchedPolygons.DataTransferObject --version 1.0.3

NuGet\Install-Package GlitchedPolygons.DataTransferObject -Version 1.0.3

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="GlitchedPolygons.DataTransferObject" Version="1.0.3" />

For projects that support PackageReference, copy this XML node into the project file to reference the package.

<PackageVersion Include="GlitchedPolygons.DataTransferObject" Version="1.0.3" />
                    

                            Directory.Packages.props

<PackageReference Include="GlitchedPolygons.DataTransferObject" />
                    

                            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 GlitchedPolygons.DataTransferObject --version 1.0.3

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

#r "nuget: GlitchedPolygons.DataTransferObject, 1.0.3"

#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 GlitchedPolygons.DataTransferObject@1.0.3

#: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=GlitchedPolygons.DataTransferObject&version=1.0.3
                    

                            Install as a Cake Addin

#tool nuget:?package=GlitchedPolygons.DataTransferObject&version=1.0.3
                    

                            Install as a Cake Tool

The NuGet Team does not provide support for this client. Please contact its maintainers for support.

DTOs

Love 'em or hate 'em

We all use them (hopefully)

This is a lightweight, zero-dependency library for C# that allows you to define your mapping logic once and use it for both EF Core SQL projections and high-performance in-memory mapping.

The problem

Usually, you have to choose between:

Manual Selects: Efficient SQL, but you duplicate code everywhere.
AutoMapper/Methods: Cleaner code, but often accidentally results in "Select All" queries or expensive runtime compilation.

The solution

This interface here uses C# 11 Static Abstract Members to create a single source of truth for your DTO's base.

Define your DTO

public class UserDto : IDataTransferObject<User, UserDto>
{
    public int Id { get; init; }

    public string? FullName { get; init; }

    // This is used by EF Core for SQL Generation via ".Select(UserDto.MapExpression)"
    public static Expression<Func<User, UserDto>> MapExpression => 
        user => new UserDto 
        { 
            Id = user.Id, 
            FullName = user.FullName
        };
}

Use it in EF Core (SQL)

Pass the expression directly into .Select(). Because it's an Expression, EF Core generates optimized SQL, fetching only the required columns.

IReadOnlyCollection<UserDto> users = 
    await 
        databaseContext
        .Users
        .Select(UserDto.MapExpression)
        .ToListAsync()
        ;

Use it In-Memory (C#)

When you already have an entity in memory, you can use the Map helper.

The library automatically compiles and caches the expression into a high-speed delegate the first time it is used.

User userEntity = GetUserFromCache();

// This uses the cached delegate (no reflection, no re-compilation).
UserDto dto = Map<User>.To<UserDto>(userEntity);

Requirements

.NET 10+
C# 11+

Product	Compatible and additional computed target framework versions.
.NET	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.

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
1.0.3	122	4/23/2026
1.0.2	104	4/23/2026
1.0.1	95	4/23/2026
1.0.0	103	4/22/2026