What is .NET 10?

.NET 10 is the newest version of a tool that developers use to build applications. Think of it like a toolbox that has better tools, faster tools, and new tools inside it.

Microsoft released it in November 2025, and they promise to support it for 3 years . This is called LTS (Long-Term Support), which means it's safe to use for important projects.

Why Should You Care?

.NET 10 is faster , more secure , and easier to use than older versions.

1. Things Run Faster Now

Speed Improvements

Your applications will run faster without you changing any code. Here's why:

Real numbers:

Startup Speed

If you compile your code ahead of time (called NativeAOT), your app will:

This is great for:

2. New C# Language Features

C# 14 has new shortcuts to make coding easier.

The field Keyword

Instead of writing this:

  
    private string _name;
public string Name
{
    get => _name;
    set => _name = value;
}

You can now write this:

  
    public string Name
{
    get;
    set => field = value?.Trim(); // field is automatic!
}

This saves you from writing the private string _name; line.

Easier Lambda Functions

You can now add ref , in , or out to parameters directly:

  
    // Before: Had to write types
Func<int, int> add = (ref int x) => x + 1;

// Now: Simpler
var add = (ref int x) => x + 1;

Better nameof Usage

You can use nameof with generic types:

  
    string typeName = nameof(List<>); // Returns "List" without needing <T>

3. Web Development Gets Better (ASP.NET Core)

Passwordless Login (Passkeys)

No more password headaches! You can now let users login using:

It's built-in and ready to use.

Blazor Improvements

Blazor is for building interactive web pages with C#.

What's better:

Better API Documentation

APIs now use OpenAPI 3.1 by default, which means better documentation and tooling.

4. Databases Get AI Powers (EF Core)

Vector Search

This is for AI things like semantic search. You can ask "show me articles similar to this one":

  
    // Find similar blog posts using AI embeddings
var similarPosts = context.Blogs
    .OrderBy(b => EF.Functions.VectorDistance("cosine", b.Embedding, myVector))
    .Take(3)
    .ToList();

This works with:

Hybrid Search

Combine regular search with AI search:

  
    // Find posts using both keyword search AND AI similarity
var results = await context.Blogs
    .OrderBy(x => EF.Functions.Rrf(
        EF.Functions.FullTextScore(x.Contents, "database"),
        EF.Functions.VectorDistance(x.Vector, myVector)))
    .Take(10)
    .ToListAsync();

You can:

6. Mobile Apps Get Better (.NET MAUI)

More Choices for Picking Files

MediaPicker now lets you:

Better Web Views

You can now:

Support for New Android Versions

Works with Android API 35 and 36 (newest Android versions)

7. Security: Quantum-Proof Encryption

Computers in the future (quantum computers) might break today's encryption. .NET 10 has new encryption types that are safe from quantum computers:

  
    if (MLDsa.IsSupported)
{
    using var mlDsa = MLDsa.Create();
    // Use new encryption algorithm
}

Think of this like upgrading your locks now before super-thieves arrive!

8. New Tools and Commands

Build Container Images Without Docker

  
    dotnet publish --arch x64 --os linux /t:PublishContainer

Your app is now in a container image!

Tab Completion

Type dotnet and press Tab to see all options. Works in Bash, PowerShell, and Zsh.

CLI Help

  
    dotnet --cli-schema

Get detailed info about what commands do.

9. Other Languages Get Updates

F#

Visual Basic

10. Desktop Apps (Windows Forms & WPF)

Windows Forms

WPF

Should You Upgrade to .NET 10?

Yes, if you: