@tsonic/dotnet-types

TypeScript declarations and metadata for .NET 10.0

Version

.NET Version: 10.0.0-rc.1.25451.107 Package Version: 10.0.0 Assemblies: 38 (76 files) Generated: 2025-11-02

Installation

npm install @tsonic/[email protected]

What's Included

This package provides TypeScript declaration files (.d.ts) and C# metadata (.metadata.json) for the .NET 10 Base Class Library:

• Collections - System.Collections, Concurrent, Immutable, Specialized
• LINQ - System.Linq, Expressions, Parallel, Queryable, AsyncEnumerable
• I/O - System.IO, FileSystem, Compression, Pipes
• Text - System.Text.Json, RegularExpressions, Encoding
• Networking - System.Net.Http, Sockets, WebSockets
• Threading - System.Threading, Tasks, Channels
• Data & XML - System.Data, System.Xml
• Security - System.Security.Cryptography, Claims
• Diagnostics - System.Diagnostics.Process, DiagnosticSource
• Core - System.Runtime, Console, ComponentModel, Reflection, Memory

Usage

With Tsonic Compiler

The Tsonic compiler will automatically discover these files when the package is installed:

// Your TypeScript code targeting .NET 10
import { List } from "System.Collections.Generic";

const names = new List<string>();
names.Add("Alice");

File Structure

All type files are located in the types/ directory:

node_modules/@tsonic/dotnet-types/
├── types/
│   ├── index.json                      # Manifest
│   ├── System.Runtime.d.ts            # Type declarations
│   ├── System.Runtime.metadata.json   # C# metadata
│   └── ...
└── README.md

Programmatic Access

import manifest from '@tsonic/dotnet-types/types/index.json';

console.log(manifest.dotnetVersion);  // "10.0.0-rc.1.25451.107"
console.log(manifest.files);          // Array of all type files

Metadata Files

Each .metadata.json file contains C# semantic information that TypeScript cannot express:

• Whether methods are virtual, abstract, sealed, or override
• Type kinds (class, struct, interface, enum)
• Base types and implemented interfaces
• Member accessibility (public, protected, private, internal)

The Tsonic compiler uses this metadata to generate correct C# code with proper inheritance semantics.

Other .NET Versions

This package contains declarations for .NET 10.0 only. For other versions:

• .NET 9: npm install @tsonic/[email protected] (coming soon)
• .NET 11: npm install @tsonic/[email protected] (coming soon)

See the main repository for all available versions.

Regeneration

These files are generated artifacts. To regenerate:

1. Use the generatedts tool
2. Run against the .NET 10.0 runtime
3. Copy output to this package

License

MIT - See LICENSE

Related

• Tsonic Compiler
• All dotnet-types versions