Welcome to C# Compass: Your Guide to Learning C#

Discover free C# tutorials and resources. Navigate your coding journey with C# Compass, designed for beginners and intermediates.

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Basics

Introduction

C# is a modern language for .NET web and enterprise applications.

Installation

C# installation uses .NET SDK with Visual Studio or VS Code.

Running Code

C# code runs via dotnet run or IDEs with .cs files.

Syntax

C# syntax uses semicolons and curly braces with type safety.

Variables

C# variables use var or explicit types with const for immutability.

Data Types

C# data types include int string and bool with type inference.

Type Inference

C# type inference uses var for local variable declarations.

Nullable Types

C# nullable types use ? for safe null handling.

Operators

C# operators include arithmetic and null-coalescing operators.

If Else

C# if-else statements control flow with pattern matching.

Switch

C# switch expressions handle cases with type patterns.

Loops

C# loops use for foreach and while with break and continue.

Comments

C# comments use // and /* */ with XML docs for APIs.

Errors

C# errors use try-catch with typed exceptions for safety.

Debugging

C# debugging uses Visual Studio with breakpoints and logging.

Best Practices

C# best practices include null safety, async patterns.

Security Basics

C# security ensures safe input handling with validation.

Namespaces

C# namespaces organize code with using statements.

Console

C# console output uses Console.WriteLine with formatting.

Methods

C# methods use typed parameters and return types.

Lambda Expressions

C# lambda expressions use => for concise functions.

Delegates

C# delegates define typed function pointers for callbacks.

Anonymous Methods

C# anonymous methods use delegate for inline logic.

Extension Methods

C# extension methods add functionality to existing types.

Async Methods

C# async methods use async/await for non-blocking calls.

Generic Methods

C# generic methods use <T> for type-safe polymorphism.

Expression-Bodied Methods

C# expression-bodied methods use => for concise syntax.

Classes

C# classes use class with properties and methods.

Structs

C# structs are value types for lightweight data.

Records

C# records provide immutable data with init-only setters.

Interfaces

C# interfaces define contracts with default implementations.

Inheritance

C# inheritance uses : for base class extension.

Abstract Classes

C# abstract classes define blueprints with abstract members.

Sealed Classes

C# sealed classes prevent inheritance for security.

Enums

C# enums define named constants with underlying types.

Properties

C# properties use get/set with auto-implemented backing.

Arrays

C# arrays are fixed-length typed collections with indexing.

Lists

C# lists use List<T> for dynamic typed collections.

Dictionaries

C# dictionaries use Dictionary<TKey TValue> for key-value pairs.

HashSets

C# HashSets store unique elements with set operations.

Queues

C# queues use Queue<T> for FIFO data structures.

Tasks

C# Tasks enable asynchronous programming with Task.Run.

Async/Await

C# async/await simplifies Tasks with error handling.

Parallel

C# Parallel class runs concurrent loops with Parallel.For.

Locks

C# locks use lock keyword for thread-safe access.

Concurrent Collections

C# concurrent collections like ConcurrentDictionary ensure thread safety.

File Reading

C# file reading uses File.ReadAllText with async support.

File Writing

C# file writing uses File.WriteAllText with buffered streams.

File Paths

C# file paths use Path for cross-platform handling.

File Deletion

C# file deletion uses File.Delete with error handling.

HTTP Server

C# HTTP server uses ASP.NET Core for web apps.

HTTP Client

C# HTTP client uses HttpClient for API calls.

HTTP Routing

C# HTTP routing uses ASP.NET Core for endpoints.

JSON Handling

C# JSON handling uses System.Text.Json for serialization.

JSON Serialization

C# JSON serialization uses JsonSerializer.Serialize with types.

JSON Deserialization

C# JSON deserialization uses JsonSerializer.Deserialize with classes.

ASP.NET Core

C# ASP.NET Core builds scalable web apps with MVC and Razor.

Razor Pages

C# Razor Pages simplify web apps with page-based routing.

MVC

C# MVC organizes web apps with controllers and views.

Blazor

C# Blazor builds interactive web UIs with C# and WebAssembly.

REST APIs

C# REST APIs use ASP.NET Core with JSON responses.

GraphQL APIs

C# GraphQL APIs use HotChocolate for typed queries.

WebSockets

C# WebSockets use SignalR for real-time communication.

Authentication

C# authentication uses Identity or JWT for secure APIs.

Environment Variables

C# environment variables use Configuration for settings.

CORS

C# CORS enables cross-origin requests with middleware.

Entity Framework

C# Entity Framework maps database queries to objects.

SQL Server

C# SQL Server uses EF Core or ADO.NET for queries.

PostgreSQL

C# PostgreSQL uses Npgsql with EF Core for typed queries.

MongoDB

C# MongoDB uses MongoDB.Driver for document data.

Database Transactions

C# database transactions use EF Core for atomicity.

Logging

C# logging uses Microsoft.Extensions.Logging for structured logs.

Error Logging

C# error logging captures exceptions with Serilog.

Request Logging

C# request logging tracks API calls with middleware.

Testing

C# testing uses xUnit or NUnit with dotnet test.

Unit Testing

C# unit testing uses Assert for function validation.

Integration Testing

C# integration testing validates APIs with TestServer.

Mocking

C# mocking uses Moq for isolated unit tests.

Benchmarking

C# benchmarking uses BenchmarkDotNet for performance tests.

REST API

C# REST API with ASP.NET Core handles CRUD with JSON.

Blazor App

C# Blazor app creates interactive UIs with WebAssembly.

Authentication API

C# authentication API uses JWT for secure endpoints.

Database CRUD

C# database CRUD with EF Core handles data operations.

Real-Time Chat

C# real-time chat uses SignalR for WebSocket messaging.

Razor Page App

C# Razor Page app creates page-based web UIs.

API Testing

C# API testing with TestServer validates REST endpoints.

Logging Setup

C# logging setup with Serilog logs requests and errors.

Dockerized App

C# Dockerized app uses Dockerfile for deployment.

Entity Framework Query

C# EF Core query retrieves data with LINQ expressions.

C# Async Code Explainer

This page provides the C# Async Code Explainer tool. Utilize it for your tasks.

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C# Code Commenter

This page provides the C# Code Commenter tool. Utilize it for your tasks.

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C# Code Formatter

This page provides the C# Code Formatter tool. Utilize it for your tasks.

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C# Error Explainer

This page provides the C# Error Explainer tool. Utilize it for your tasks.

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C# LINQ Reference

This page provides the C# LINQ Reference tool. Utilize it for your tasks.

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C# Nullability Checker

This page provides the C# Nullability Checker tool. Utilize it for your tasks.

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C# to F# Converter Preview

This page provides the C# to F# Converter Preview tool. Utilize it for your tasks.

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C# XML Doc Generator

This page provides the C# XML Doc Generator tool. Utilize it for your tasks.

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Welcome to C# Compass: Your Guide to Learning C#

Basics

Functions

Classes

Data Structures

Concurrency

File I/O

HTTP

JSON

Web Development

Databases

Logging

Testing

Examples

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