Roadmap / C#
A comprehensive C# roadmap covering modern syntax, OOP, generics, LINQ, async/await, testing, diagnostics, source generators, and idiomatic .NET development.
Step 1 • Foundations
Learn expressions, conditionals, loops, value and reference types, nullable reference types, and the core syntax of modern C#.
Step 2 • Foundations
Learn the full C# type model including classes, value-type structs, immutable records, properties, and access modifiers so object boundaries stay explicit.
Step 3 • Foundations
Use generic types and constraints, choose the right collection for the job, and design composable APIs with covariant and contravariant interfaces.
Step 4 • Foundations
Handle failures explicitly, use modern pattern matching (switch expressions, property patterns, list patterns) to make control flow readable and exhaustive.
Step 5 • Tooling
Write expressive filtering, projection, grouping, joins, and aggregation with LINQ instead of imperative loops.
Step 6 • Tooling
Master async/await, Task composition, cancellation tokens, IAsyncEnumerable, and the pitfalls of async void and deadlocks.
Step 7 • Tooling
Organize multi-project solutions with clean reference boundaries, manage NuGet dependencies, and understand SDK-style project files.
Step 8 • Tooling
Use the built-in .NET DI container, register services with correct lifetimes, and design components that are easy to test and replace.
Step 9 • Quality
Test business logic, service behavior, and edge cases with xUnit, FluentAssertions, and AutoFixture so refactoring stays safe.
Step 10 • Quality
Test ASP.NET Core APIs end-to-end using WebApplicationFactory with real databases (via Testcontainers), auth, and dependency overrides.
Step 11 • Quality
Apply Roslyn analyzers, dotnet-format, EditorConfig, and nullable enforcement to catch issues before code review and fail CI on regressions.
Step 12 • Advanced
Understand allocation patterns, use Span<T> and Memory<T> for zero-allocation code, and profile hot paths with BenchmarkDotNet and dotnet-counters.
Step 13 • Advanced
Use Roslyn source generators to eliminate reflection-based code at compile time, generate repetitive boilerplate, and improve startup performance.
Step 14 • Ship It
Publish reusable packages to NuGet, version them with SemVer, maintain API compatibility, and write C# that feels idiomatic to experienced .NET teams.
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