C# — Advanced
Understand why .NET behaves the way it does: memory and the GC, advanced type system and generics, delegates and expression trees, reflection and Roslyn metaprogramming, async and concurrency internals, channels and backpressure, performance engineering that measures first, diagnostics, native interop, security, and a production capstone — every challenge executed in the real .NET 10 sandbox.
Who this course is for
Developers who finished C# Intermediate and want runtime-level depth: memory, concurrency, metaprogramming, performance, security, and production architecture.
What you will be able to do
- Reason about value/reference semantics, boxing, and the memory model
- Write advanced generic abstractions with variance and static abstracts
- Build delegates, closures, and expression trees deliberately
- Use reflection, analyzers, and source generators safely
- Master async internals: state machines, ValueTask, cancellation
- Diagnose races, deadlocks, and memory leaks with evidence
- Engineer performance by measuring allocations and collections
- Read IL and metadata with PEReader/MetadataReader
- Design channels, backpressure, and graceful shutdown pipelines
- Apply security thinking: injection, deserialization, SSRF, secrets
- Ship a distributed-style job platform with retries and idempotency
Advanced Language Semantics
Execution model, value vs reference behavior, boxing, null-state, and how the compiler resolves your code.
- From source to executing IL⭐⭐⭐ advanced⏳ 14 min read
- Value semantics vs reference semantics⭐⭐⭐ advanced⏳ 13 min read
- Boxing, unboxing, and hidden allocations⭐⭐⭐ advanced⏳ 14 min read
- Null-state analysis and the nullable contract⭐⭐⭐ advanced⏳ 15 min read
- Overload resolution, conversions, and patterns⭐⭐⭐ advanced⏳ 16 min read
- Checkpoint: language semantics⭐⭐⭐ advanced⏳ 12 min read
Memory and the Object Model
Where values live, when copying happens, how spans avoid allocation, and how to measure all of it.
Advanced Generics and the Type System
Variance, static abstracts, generic math, and constraints that compile into proofs — plus their runtime cost.
Delegates, Closures, and Functional C#
What a delegate actually is, what lambdas allocate, how closures capture, and when expression trees beat code.
Reflection and Attributes
Type discovery, dynamic invocation, metadata caches, attribute-driven behavior — and the security and performance bill.
Roslyn and Compiler APIs
Syntax trees, semantic models, symbols, diagnostics — and analyzers that read your code like the compiler does.
Source Generators
Compile-time code generation: incremental pipelines, generated code rules, and the reflection-free future.
Expression Trees and LINQ Providers
Building, compiling, inspecting, and translating expression trees — the machinery under every LINQ provider.
Advanced Async
State machines, ValueTask, cancellation propagation, async streams, and the failure modes async hides.
Advanced Concurrency
Memory visibility, Interlocked, concurrent collections, deadlocks — and the bugs that only appear under load.
Parallel Programming
Parallel.For, PLINQ, partitioning, and the arithmetic of when parallelism pays — measured, not assumed.
Channels and Producer/Consumer Systems
System.Threading.Channels: bounded buffering, backpressure, completion, and graceful shutdown pipelines.
Garbage Collection and Memory Management
Generations, allocation behavior, finalization, weak references, leaks, and pooling — measured, not folk wisdom.
Performance Engineering
Measurement discipline, allocation and CPU profiling, JIT effects, and the optimize-what-matters loop.
JIT, Runtime, and CLR Internals
From IL to native code: assemblies, metadata, tiered compilation, virtual dispatch, and exceptions.
Advanced Debugging and Diagnostics
Reading failures: stack traces, exception analysis, health probes, and resilience patterns — with the tools the sandbox has.
Native Interop and Unsafe C#
Pointers within managed memory, pinning, P/Invoke concepts, blittable types — the managed/unmanaged boundary, safely taught.
- Managed, unmanaged, unsafe: the boundary⭐⭐⭐ advanced⏳ 15 min read
- Unsafe pointers, fixed, and pinning⭐⭐⭐ advanced⏳ 16 min read
- Interop without native libraries: Unsafe, MemoryMarshal⭐⭐⭐ advanced⏳ 15 min read
- P/Invoke concepts and the security bill⭐⭐⭐ advanced⏳ 15 min read
- Checkpoint: unsafe and interop⭐⭐⭐ advanced⏳ 12 min read
NativeAOT, Trimming, and Deployment Models
How .NET ships: framework-dependent, self-contained, trimmed, AOT — the tradeoffs and the reflection tax.
- The deployment spectrum⭐⭐⭐ advanced⏳ 15 min read
- Trimming and the reflection tax⭐⭐⭐ advanced⏳ 16 min read
- The AOT mindset: runtime services, statically⭐⭐⭐ advanced⏳ 15 min read
- Configuration, startup, and the compile-time contract⭐⭐⭐ advanced⏳ 14 min read
- Checkpoint: deployment and AOT⭐⭐⭐ advanced⏳ 12 min read
Advanced Networking
Sockets on loopback: framing, protocols, connection lifecycle, and the failure modes of distributed I/O — verified in the sandbox.
Distributed Systems
Failure, retries, idempotency, eventual consistency — the concepts and the simulations, deterministic in the sandbox.
Advanced Security
Crypto API discipline, secret handling, injection and deserialization defenses — threat modeling for C# services.
Advanced Data Access
Connection lifecycle, transaction safety, isolation levels, optimistic concurrency, and N+1 — simulated in-box, deterministically.
Production Architecture and Capstone
Modular monoliths, dependency direction, observability, resilience — and a job-processing platform that assembles everything.
- Modular monoliths and dependency direction⭐⭐⭐ advanced⏳ 15 min read
- Observability: logs, metrics, traces⭐⭐⭐ advanced⏳ 15 min read
- Reliability: retries, idempotency, backpressure⭐⭐⭐ advanced⏳ 15 min read
- Capstone: the job-processing platform⭐⭐⭐ advanced⏳ 16 min read
- Checkpoint: production architecture⭐⭐⭐ advanced⏳ 12 min read