Comprehensive development platform with C# as modern language and ASP.NET Core for building REST APIs, microservices and high-performance web applications. Cross-platform architecture with Entity Framework Core, native dependency injection and rich ecosystem for enterprise-grade applications.
Modern C# with async/await, LINQ, pattern matching, records and nullable reference types
ASP.NET Core MVC and Minimal APIs for performant REST endpoints
Entity Framework Core for ORM with migrations, LINQ to SQL and change tracking
Native Dependency Injection with service lifetime (Singleton, Scoped, Transient)
Middleware pipeline for authentication, logging, CORS and error handling
Authentication & Authorization with Identity, JWT Bearer, OAuth2 and OpenID Connect
SignalR for real-time communication (WebSockets, Server-Sent Events)
Comprehensive testing (xUnit, NUnit, Moq, integration tests with WebApplicationFactory)
Exceptional performance with Span<T>, Memory<T>, System.Text.Json and AOT compilation
Cross-platform with .NET runtime (Windows, Linux, macOS, Docker containers)
The most important concepts to understand this technology and ace your interviews
C#: value/reference types, boxing/unboxing, async/await, Task, ValueTask
LINQ: query syntax, method syntax, deferred execution, IEnumerable vs IQueryable
ASP.NET Core: Program.cs, Startup, middleware pipeline, hosting model
Controllers and Minimal APIs: routing, model binding, action results
Dependency Injection: service registration, lifetimes (Singleton, Scoped, Transient)
Entity Framework Core: DbContext, DbSet, migrations, relationships, lazy/eager loading
LINQ to Entities: Include, ThenInclude, AsNoTracking, projections, raw SQL
Authentication: ASP.NET Core Identity, JWT tokens, claims, policies, roles
Authorization: [Authorize], policy-based, resource-based, custom requirements
Middleware: built-in (UseRouting, UseAuthentication), custom middleware
Configuration: appsettings.json, environment variables, Options pattern, IConfiguration
Error handling: exception filters, middleware, ProblemDetails, global handlers
Validation: Data Annotations, FluentValidation, model state, custom validators
Testing: unit tests (xUnit, NUnit), integration tests, mocking (Moq, NSubstitute)
SignalR: hubs, strongly-typed hubs, groups, connection lifecycle
Performance: async best practices, Span<T>, Memory<T>, object pooling, caching
API versioning, Swagger/OpenAPI, rate limiting, health checks
Logging (ILogger, Serilog), monitoring, Docker, deployment (Azure, AWS, on-premise)
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