C# · .NET · 1:1 · 60 MIN · FROM 59.99 €/H

C# explained by a senior who also writes Java for a living.

Live with a senior dev who uses C# and Java in the same week. We translate Java reflexes into idiomatic C#, walk LINQ and async/await, and make ASP.NET Core feel familiar instead of foreign.

Dennis LIVE Senior Java · C# / .NET · 11 yrs industry responds ≤ 4 h Free first conversation →

Want to see the Java → C# translation first? View the Rosetta table →

60 min · 1:1 with a senior .NET dev
·
Browser classroom, no Zoom
·
Cancel up to 12 h ahead

Dennis

LIVE · Senior Java · C# / .NET · 11 yrs industry

● UsersController.cs ⎙ shared

// LINQ + async, Java reflexes welcome
public async Task<List<User>> GetActive() =>
  await _db.Users
    .Where(u => u.IsActive)
    .OrderBy(u => u.Name)
    .ToListAsync();

LINQ chains read like Streams. You already know this language. — Dennis, 16 min ago

Live from a real session

● UsersController.cs ⎙ shared

// LINQ + async, Java reflexes welcome
public async Task<List<User>> GetActive() =>
  await _db.Users
    .Where(u => u.IsActive)
    .OrderBy(u => u.Name)
    .ToListAsync();

LINQ chains read like Streams. You already know this language. — Dennis, 16 min ago

JAVA → C# · ROSETTA

Coming from Java? Here is what changes on day one.

Side-by-side translations of the patterns Java developers use ten times a day. Same intent, different idiom. Your muscle memory does not have to start over.

Java

private String name;
public String getName() { return name; }
public void setName(String n) { name = n; }

public string Name { get; set; }

Why

Auto-properties are first-class in C#. No boilerplate, and you can add validation later without changing every call site.

Java

users.stream()
     .filter(u -> u.isActive())
     .map(User::getEmail)
     .toList();

users.Where(u => u.IsActive)
     .Select(u => u.Email)
     .ToList();

Why

Same shape, different verbs. `filter` → `Where`, `map` → `Select`, `collect(toList)` → `ToList()`. LINQ is evaluated lazily, just like Stream.

Java

Optional<User> findUser(long id);

User? FindUser(long id);

Why

Nullable Reference Types put the contract in the type, with compile-time warnings. No Optional wrapper, no `.orElseThrow()` ceremony.

Java

@Override public boolean equals(Object o) { ... }
@Override public int hashCode() { ... }

public record User(string Email, string Name);

Why

C# records auto-generate value equality and a sensible `GetHashCode`. For DTOs and value objects, you stop writing equals/hashCode entirely.

Java

CompletableFuture.supplyAsync(() -> fetch())
  .thenApply(this::parse)
  .thenAccept(this::save);

var raw = await Fetch();
var parsed = Parse(raw);
Save(parsed);

Why

`async/await` reads like sequential code while still running asynchronously. No callback chain, no `.thenApply` ladders.

C# CURRICULUM

C# and .NET, the parts that show up in exams and jobs.

From your first Console.WriteLine to a small ASP.NET Core endpoint with LINQ on an in-memory list. We focus on what you actually need, not on a full Microsoft Learn track.

C# basics

Types, control flow, methods, properties. The block every later topic builds on.

int, double, string, bool
var vs explicit types
Methods and overloads
Properties and auto-properties
Nullable reference types
string interpolation

OOP in C#

Classes, inheritance, interfaces. Close to Java, with a few sharper edges and helpers.

Classes, structs and records
Inheritance and polymorphism
Interfaces and default methods
Abstract vs sealed classes
Equality, GetHashCode, Equals
Records for value semantics

Collections and LINQ

Where C# really pulls ahead of Java for everyday tasks: LINQ on lists, dicts and queries.

List, Dictionary, HashSet basics
IEnumerable vs IList
LINQ: Where, Select, GroupBy
OrderBy and ThenBy
Lambdas and expression trees
Deferred vs immediate execution

Async, await, exceptions

The async model that confuses Java devs first, then becomes their favourite C# feature.

async / await mental model
Task and Task<T>
ConfigureAwait, simply explained
try / catch / finally idioms
Custom exceptions
Cancellation tokens

ASP.NET Core, lightweight

A minimal REST endpoint, dependency injection, and how requests actually flow.

Minimal API: hello-world endpoint
Controllers and routing
Dependency injection in DI container
appsettings and configuration
Model binding and validation
Entity Framework Core, first taste

From Java to C#

A dedicated translation track for anyone who already writes Java and wants to be productive in C# fast.

Property vs getter/setter
out / ref / in parameters
Equals and hashCode → Equals / GetHashCode
Streams → LINQ
Optional → nullable reference types
Maven/Gradle → dotnet CLI

ROADMAP

How a C# series with us runs.

Concrete sessions, concrete artefacts. You decide after the first chat whether we run the full arc or jump straight to LINQ, async or ASP.NET Core.

S1

Step 1

Diagnosis

We look at your code, exam or project. 30 min later we both know whether the gap is syntax, OOP, LINQ, async or just the new tooling.
S2

Step 2

Basics and OOP

Types, methods, properties, inheritance, interfaces. Drilled with small live exercises. If you come from Java we map the differences explicitly.
S3

Step 3

Collections and LINQ

The session students remember. We replace ten loops with three LINQ chains and finally make GroupBy click.
S4

Step 4

Async and await

The async model in pictures. Task, await points, where deadlocks come from, and how to write async code that does not lie about its execution order.
S5

Step 5

ASP.NET Core

Build a small endpoint together. Routing, DI, model binding. Optional: first contact with Entity Framework Core.
S6

Step 6

Your assignment or exam

We walk your real task and ship a version you can hand in or merge without explaining away the awkward parts.

Marcel Schmidtpeter, Gründer und Senior Developer, Study IT

FROM THE FOUNDER

Why Study IT exists.

I built Study IT because I have seen first-hand how computer-science teaching at university falls apart.

Our tutors are working developers, not student side-jobbers.

Marcel Schmidtpeter Gründer und Senior Developer

Reach me directly: marcel.schmidtpeter@study-it.education

DEIN TUTOR FÜR C# UND .NET

Dennis kennt C# aus Industrie-Projekten.

Senior Java Software Engineer mit projektabhängigem C#/.NET-Einsatz. Er zieht den Sprachvergleich zu Java sauber und führt dich durch ASP.NET Core, LINQ und Collections.

Online · replies quickly

Industrieerfahrung: 11 J
Java Engineer: Senior
seit 2015: FIAE

Dennis

Senior Java Software Engineer

„Programmieren versteht man, wenn man weiß, warum eine Lösung funktioniert. Mein Ziel: dass du Code nicht abschreibst, sondern selbst hinkriegst."

Background

Heute Senior Java Software Engineer · Industrie
2015 bis heute Softwareentwicklung in der Industrie · 2 berufliche Stationen, 11 Jahre kumuliert
2015 bis 2018 Ausbildung Fachinformatiker Anwendungsentwicklung · Praxisbetrieb · IHK-Abschluss

Java
Spring
C#
Python
OOP
Algorithmen
Datenstrukturen
Unit Testing

AT A GLANCE

Response time: ≤ 4 h
Teaches: Studierende · Azubis · Quereinsteiger
Language: Deutsch (Muttersprache)

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PRICING

Transparent pricing. No subscription.

One session, an intensive block, or semester support. Same hourly rate, same senior tutor.

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ALSO LEARN WITH US

Related services from Study IT.

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FAQ

C# tutoring: frequently asked questions

I come from Java. Will I be lost?

Quite the opposite. Dennis writes both in the same week, so we run a Java-to-C# translation track when useful: properties vs getters, LINQ vs Streams, nullable reference types vs Optional, dotnet CLI vs Maven.

Do you only teach C# on .NET 8/9, or also older versions?

We focus on modern .NET (8 / 9) and write the C# version the industry actually ships today. If your course or company is on .NET Framework or older C#, just tell us in the first chat.

Do you cover ASP.NET Core and EF Core?

Yes, at the level a student or junior dev needs: a minimal endpoint, routing, dependency injection, and a first contact with Entity Framework Core. Not a full architecture course.

Can you help with a Unity / game-dev project?

Out of scope. We coach C# the language and .NET on the server / desktop side. Unity-specific topics (MonoBehaviour, prefabs, the engine itself) are not what we do.

Can you help with a C# exam at university?

Yes. Bring past papers and the syllabus. We work the typical exam traps live: LINQ chains, async / await execution order, value vs reference types, and OOP design.

Do I need Visual Studio installed?

Not for the first session. The browser classroom is enough. For longer arcs we help you get the dotnet CLI and either VS Code or Visual Studio running locally so you can practise between sessions.

C# / .NET · 1:1 · FREE FIRST CHAT

Java in your head, C# on the screen? We'll map it with you.

15 minutes to talk, then you decide. Properties, LINQ, nullable types: the Java-to-C# translation runs in the background.

Book free first chat →