MonadicTypes.NET.Linq 0.3.0-preview.2

.NET 10.0 This package targets .NET 10.0. The package is compatible with this framework or higher.
This is a prerelease version of MonadicTypes.NET.Linq. 
dotnet add package MonadicTypes.NET.Linq --version 0.3.0-preview.2
                    


                    

                
NuGet\Install-Package MonadicTypes.NET.Linq -Version 0.3.0-preview.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="MonadicTypes.NET.Linq" Version="0.3.0-preview.2" />
For projects that support PackageReference, copy this XML node into the project file to reference the package. 
<PackageVersion Include="MonadicTypes.NET.Linq" Version="0.3.0-preview.2" />
                    


                            Directory.Packages.props
                        

                    

                
<PackageReference Include="MonadicTypes.NET.Linq" />
                    


                            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 MonadicTypes.NET.Linq --version 0.3.0-preview.2
                    


                    

                
#r "nuget: MonadicTypes.NET.Linq, 0.3.0-preview.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 MonadicTypes.NET.Linq@0.3.0-preview.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=MonadicTypes.NET.Linq&version=0.3.0-preview.2&prerelease
                    


                            Install as a Cake Addin
                        

                    

                
#tool nuget:?package=MonadicTypes.NET.Linq&version=0.3.0-preview.2&prerelease
                    


                            Install as a Cake Tool

MonadicTypes.NET LINQ

Opt-in C# LINQ names and query-expression support for Result<T,E> and Option<T>. The core package does not reference this assembly.

Install

dotnet add package MonadicTypes.NET.Linq --prerelease

Fluent Syntax

using MonadicTypes;
using MonadicTypes.Linq;

Result<Invoice, LoadError> invoice = LoadUser(id).SelectMany(
    static user => LoadAccount(user.AccountId),
    static (user, account) => new Invoice(user, account));

Option<UserView> active = optionalUser
    .Where(static user => user.IsActive)
    .Select(static user => new UserView(user.Id, user.Name));

Select maps the active value. SelectMany binds and projects two active values. Option Where filters Some; Result intentionally has no Where because a failed predicate needs an explicit error value.

Query Syntax

Result<Invoice, LoadError> invoice =
    from user in LoadUser(id)
    from account in LoadAccount(user.AccountId)
    select new Invoice(user, account);

Both forms short-circuit Result failure and Option None. Operators do not catch callback exceptions, and uninitialized Results throw.

Fluent method syntax is recommended by default. Initial NativeAOT measurements were 2.095 ns fluent versus 2.355 ns query syntax for Select, and 4.509 ns versus 4.952 ns for SelectMany. All rows allocated 0 B.

Apache-2.0. Developed with AI assistance.

Complete API reference

Documented public members: 6

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.

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
0.3.0-preview.2 39 9/12/2026
0.3.0-preview.1 44 9/12/2026
0.2.0-preview.2 73 8/30/2026
0.2.0-preview.1 74 8/17/2026