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+# What’s New in .NET 10 Libraries and Runtime?
+
+With .NET 10, Microsoft continues to evolve the platform toward higher performance, stronger security, and modern developer ergonomics. This release brings substantial updates across both the **.NET Libraries** and the **.NET Runtime**, making everyday development faster, safer, and more efficient.
+
+
+
+------
+
+## .NET Libraries Improvements
+
+### 1. Post-Quantum Cryptography
+
+.NET 10 introduces support for new **quantum-resistant algorithms**, ML-KEM, ML-DSA, and SLH-DSA, through the `System.Security.Cryptography` namespace.
+ These are available when running on compatible OS versions (OpenSSL 3.5+ or Windows CNG).
+
+**Why it matters:** This future-proofs .NET apps against next-generation security threats, keeping them aligned with emerging FIPS standards and PQC readiness.
+
+
+
+------
+
+### 2. Numeric Ordering for String Comparison
+
+The `StringComparer` and `HashSet` classes now support **numeric-aware string comparison** via `CompareOptions.NumericOrdering`.
+ This allows natural sorting of strings like `v2`, `v10`, `v100`.
+
+**Why it matters:** Cleaner and more intuitive sorting for version names, product codes, and other mixed string-number data.
+
+
+
+------
+
+### 3. String Normalization for Spans
+
+Normalization APIs now support `Span<char>` and `ReadOnlySpan<char>`, enabling text normalization without creating new string objects.
+
+**Why it matters:** Lower memory allocations in text-heavy scenarios, perfect for parsers, libraries, and streaming data pipelines.
+
+
+
+------
+
+### 4. UTF-8 Support for Hex String Conversion
+
+The `Convert` class now allows **direct UTF-8 to hex conversions**, eliminating the need for intermediate string allocations.
+
+**Why it matters:** Faster serialization and deserialization, especially useful in networking, cryptography, and binary protocols.
+
+
+
+------
+
+### 5. Async ZIP APIs
+
+ZIP handling now fully supports asynchronous operations, from creation and extraction to updates, with cancellation support.
+
+**Why it matters:** Ideal for real-time applications, WebSocket I/O, and microservices that handle compressed data streams.
+
+
+
+------
+
+### 6. ZipArchive Performance Boost
+
+ZIP operations are now faster and more memory-efficient thanks to parallel extraction and reduced memory pressure.
+
+**Why it matters:** Perfect for file-heavy workloads like installers, packaging tools, and CI/CD utilities.
+
+------
+
+
+
+### 7. TLS 1.3 Support on macOS
+
+.NET 10 brings **TLS 1.3 client support** to macOS using Apple’s `Network.framework`, integrated with `SslStream` and `HttpClient`.
+
+**Why it matters:** Consistent, faster, and more secure HTTPS connections across Windows, Linux, and macOS.
+
+
+
+------
+
+### 8. Telemetry Schema URLs
+
+`ActivitySource` and `Meter` now support **telemetry schema URLs**, aligning with OpenTelemetry standards.
+
+**Why it matters:** Simplifies integration with observability platforms like Grafana, Prometheus, and Application Insights.
+
+
+
+------
+
+### 9. OrderedDictionary Performance Improvements
+
+New overloads for `TryAdd` and `TryGetValue` improve performance by returning entry indexes directly.
+
+**Why it matters:** Up to 20% faster JSON updates and more efficient dictionary operations, particularly in `JsonObject`.
+
+
+
+------
+
+## .NET Runtime Improvements
+
+
+
+### 1. JIT Compiler Enhancements
+
+- **Faster Struct Handling:** The JIT now passes structs directly via CPU registers, reducing memory operations.
+   *→ Result: Faster execution and tighter loops.*
+   
+- **Array Interface Devirtualization:** Loops like `foreach` over arrays are now almost as fast as `for` loops.
+   *→ Result: Fewer abstraction costs and better inlining.*
+   
+- **Improved Code Layout:** A new 3-opt heuristic arranges “hot” code paths closer in memory.
+   *→ Result: Better branch prediction and CPU cache performance.*
+   
+- **Smarter Inlining:** The JIT can now inline more method types (even with `try-finally`), guided by runtime profiling.
+   *→ Result: Reduced overhead for frequently called methods.*
+   
+   
+
+------
+
+### 2. Stack Allocation Improvements
+
+.NET 10 extends stack allocation to **small arrays of both value and reference types**, with **escape analysis** ensuring safe allocation.
+
+**Why it matters:** Fewer heap allocations mean less GC work and faster execution, especially in high-frequency or temporary operations.
+
+
+
+------
+
+### 3. ARM64 Write-Barrier Optimization
+
+The garbage collector’s write-barrier logic is now optimized for ARM64, cutting unnecessary memory scans.
+
+**Why it matters:** Up to **20% shorter GC pauses** and better overall performance on ARM-based devices and servers.
+
+
+
+
+
+## Summary
+
+.NET 10 doubles down on **performance, efficiency, and modern standards**. From quantum-ready cryptography to smarter memory management and diagnostics, this release makes .NET more ready than ever for the next generation of applications.
+
+Whether you’re building enterprise APIs, distributed systems, or cloud-native tools, upgrading to .NET 10 means faster code, safer systems, and better developer experience.