What's New in .NET 10: A Complete Overview

.NET 10 is Microsoft’s latest long-term support (LTS) release, introducing key updates across runtime performance, libraries, APIs, and developer productivity. It enhances scalability, speeds up execution, and streamlines coding with new language features and tooling improvements. This article explores the major changes in .NET 10 and how they benefit developers and businesses alike.

1. Performance Enhancements in .NET Runtime

1.1 JIT Optimization and Devirtualization

The Just-In-Time (JIT) compiler in .NET 10 includes several optimizations to improve execution time and reduce memory usage:

• Devirtualization – .NET 10 extends support for devirtualization, especially for array interface methods. This allows the JIT to convert virtual calls to direct calls at runtime, improving performance in collection-heavy operations.
• Stack Allocation for Small Fixed-Size Arrays – Arrays of value types without GC pointers can now be stack-allocated, reducing heap pressure and improving access speed. This is especially beneficial for numerical computing and matrix operations.
• Better Tiered Compilation – Tiered compilation has been fine-tuned to reduce overhead during warmup, allowing applications to reach peak performance faster.

1.2 AVX 10.2 Support

• AVX (Advanced Vector Extensions) 10.2 is now supported for x64 processors, enhancing vectorized calculations for future hardware.
• The System.Runtime.Intrinsics.X86.Avx10v2 class allows developers to prepare their code for future CPU compatibility.
• AVX 10.2 support enhances performance for mathematical computations and data processing.

1.3 Loop Optimizations

• Improved loop unrolling and removal of redundant bounds checks increase performance for iterative operations.
• Loop hoisting reduces the cost of recalculating loop-invariant expressions, enhancing runtime efficiency.

2. Library Updates and New APIs

2.1 Certificate Handling

• A new FindByThumbprint method allows developers to locate certificates using hash algorithms other than SHA-1.
• This strengthens security and flexibility when working with SSL/TLS and secure communications.

2.2 Unicode String Normalization

• Enhanced support for Unicode normalization with spans increases the performance of string handling.
• CompareOptions.NumericOrdering allows string comparison based on numerical value rather than character-by-character comparison.

2.3 TimeSpan and Date Handling

• TimeSpan.FromMilliseconds has a new overload that accepts a single parameter, simplifying the syntax for time handling.
• The ISOWeek class now supports DateOnly, making it easier to work with week-based date calculations.
• Enhanced DateTimeOffset formatting improves compatibility with ISO 8601 standards.

2.4 Performance Improvements in Collections

• OrderedDictionary<TKey,TValue> includes new methods like TryAdd and TryGetValue, which return an index to the entry.
• This reduces the need for additional lookup operations, improving dictionary performance in large datasets.

2.5 JSON Serialization and Deserialization

• System.Text.Json now supports ReferenceHandler in JsonSourceGenerationOptionsAttribute, improving object reference handling in serialization.
• JSON parsing and writing are faster due to better memory management and reduced GC pressure.

3. SDK and Tooling Enhancements

3.1 Framework Package Pruning

• .NET 10 SDK introduces package pruning to reduce unused framework references.
• Applications are now smaller and load faster due to fewer unnecessary dependencies.
• The dotnet prune command helps automate this process, improving CI/CD pipeline efficiency.

3.2 Hot Reload

• Hot Reload improvements allow changes to C# code to be applied without restarting the app.
• Enhanced diagnostic messages and faster feedback loops boost developer productivity.

3.3 NuGet Package Restore Improvements

• Parallel processing for package restores reduces build times, especially for large projects.
• Improved caching further reduces network dependency and speeds up project load times.

4. ASP.NET Core 10 Enhancements

4.1 Blazor and SignalR Updates

• Blazor QuickGrid Enhancements – New RowClass parameter allows conditional row styling.
• Static Web Asset Improvements – Simplified handling of static web assets improves build performance.
• SignalR Performance Boost – Lower latency and enhanced connection handling for real-time communication.

4.2 Minimal APIs and OpenAPI

• Minimal APIs support more complex routing scenarios.
• OpenAPI now supports generating OpenAPI 3.1 documents and serving them in YAML format.
• Endpoint metadata improvements allow for better API documentation and testing.

4.3 Authentication and Authorization

• Enhanced support for IKeyedServiceProvider allows more granular service resolution in authentication and authorization.
• New methods in Microsoft.AspNetCore.Authentication simplify token handling.

5. .NET MAUI and Mobile Development

5.1 Quality and Performance Improvements

• .NET MAUI includes better error diagnostics and stability improvements.
• Support for newer platform-specific APIs improves compatibility with iOS, Android, macOS, and Windows.

5.2 Accessibility and UI Enhancements

• Improved screen reader support and high-contrast themes enhance accessibility.
• Better layout handling reduces UI glitches across platforms.

6. Entity Framework (EF) Core 10

6.1 LINQ and SQL Translation

• LINQ queries now have better SQL translation, reducing query generation time.
• New ExecuteUpdateAsync and ExecuteDeleteAsync methods simplify data updates.

6.2 Connection Resiliency

• Improved retry logic for transient failures increases database connection reliability.
• Load-balancing support for connection strings enhances high-availability scenarios.

7. C# 14 Features

7.1 Implicit Span Conversions

• Implicit conversions between Span<T> and ReadOnlySpan<T> reduce memory copy overhead.
• Enhanced support for readonly ref parameters improves performance in low-level code.

7.2 Pattern Matching Enhancements

• New syntax for list patterns simplifies collection handling.
• Better support for switch expressions increases code readability.

7.3 Field-Backed Properties

• Fields can now be backed by auto-properties, reducing boilerplate code.
• Enhanced nullability checks improve code safety.

8. Windows Forms Enhancements

8.1 Clipboard Handling

• New clipboard APIs support both synchronous and asynchronous data transfer.
• Serialization improvements reduce data loss during large data transfers.

8.2 High DPI and Theming

• High DPI support improves the appearance of Windows Forms apps on modern displays.
• New theming options allow for custom styles and dynamic updates.

Business and Development Impact

.NET 10’s enhancements in performance, SDK tooling, and library support allow businesses to:

• Build faster, more scalable applications.
• Improve code quality and reduce debugging time.
• Simplify complex API handling and data processing.
• Better cross-platform performance with .NET MAUI and ASP.NET Core.

Ansi ByteCode LLP Expertise in .NET 10

At Ansi ByteCode LLP, we specialize in building cutting-edge applications using the latest .NET technologies. Our team of certified developers can help you:

• Migrate existing .NET Framework apps to .NET 10.
• Build modern web and mobile apps using Blazor, .NET MAUI, and EF Core 10.
• Optimize runtime performance and reduce cloud costs using .NET 10’s enhanced JIT compiler and AVX 10.2 support.

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References

• What’s new in .NET 10 – Microsoft
• C# 14 Features – Microsoft
• ASP.NET Core Updates – Microsoft