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Smart C# App Development For Windows Desktop (.NET 10)

Name: Smart C# App Development For Windows Desktop (.NET 10)
Rating: 4.9 (9 reviews)

Build C Sharp Projects with OOP and .NET 10. Windows App Development with Microsoft Visual Studio 2026

Created byDan Munteanu

Last updated 5/2026

English

What you'll learn

Build Windows Forms Applications in C# (C Sharp)
Program in C Sharp With OOP
C Sharp Projects For Beginners
Read, write, modify YAML data with CSharp
Apply object-oriented programming (OOP) principles in a real world project
Debug applications with Visual Studio (setting breakpoints, bug hunting)
Design responsive user interfaces (controls, events, layouts)
Follow best coding practices for clean, maintainable C# source code
Strengthen your understanding of C# language programming fundamentals
Develop responsive windows application forms
Simple C# Projects with source code

Course content

7 sections • 62 lectures • 3h 44m total length

Course Summary & Introduction2:58
How is this course going to help you and who are you learning with?

Section Objective0:10
Section 2 Objective.
Yaml Parser Source Files0:14
The Yaml Parser source code repository.
Markdown Test Files0:07
Creating The App And Folder Selection5:12
Creating the application solution with Microsoft Visual Studio.
Placing the initial UI controls.
Adding Events, File Names Listbox, Selection Editor3:30
Adding empty event handlers.
Defining the workflow for these events.
Adding a Listbox for file names.
Displaying the selected file name.
Adding YAML Data Controls3:12
Adding YAML data controls.
Renaming UI Controls1:50
Renaming user interface controls to keep in line with the naming standards.
Adding File Contents Editor & Running The App2:19
Adding the control to display the contents of a selected files; Running the app for the first time.
Loading File Names From Folder4:54
Loading the file names for the selected folder.
Implementing The Folder Selection Dialog2:27
User Interface Design Quiz

Section Objective0:10
Section 3 objective.
Creating The GitHub Repository1:38
Creating the GitHub repository for source tracking and publishing the project files.
Toggle Editors3:46
Implementing a method to toggle selection editors.
Defining The List Selection Workflow3:11
Defining and clarifying the workflow we expect when selecting a single file name from the list.
Implementing List Selection3:11
Implementing the list selection handler.
Loading Default Folder2:01
Loading a default folder on application start.
Loading File Contents2:38
Loading selected file contents.

Section Objective0:10
Installing NuGet Extensions In Visual Studio0:53
The industry standards for parsing YAML and Markdown in C# are YamlDotNet & Markdig.
Creating The YAML Data Structure1:51
This segment is a classic "Data Model" step. Creating that FrontMatterData class is essential because it acts as the bridge between the raw YAML text and your C# logic.
Creating The Markdown Extensions Class5:09
Creating the class and methods to process markdown files. You're setting up a generic helper class and configuring the YamlDotNet builder with those crucial "naming conventions" and "ignore unmatched properties" settings.
Using The GetFrontMatter Method4:16
You are taking the data from your parser and actually wiring it up to the WinForms UI elements.
Debugging Our First Exception3:46
Debugging the first exception.
Debugging Quiz
Loading Default Values4:03
Loading default YAML fields on pressing the defaults button.
Clearing Yaml Fields3:02
This segment is all about "clean code" and refactoring. Refactoring your method names makes the code much more readable for anyone else (or your future self) looking at it.
Making Room For Fields, Clear Method0:53
This segment wraps up the "Defaults" and "Clear" logic while shifting focus back to the UI layout. It’s a great example of how development is a constant loop between writing logic and refining the user interface to make that logic actually readable.
Cathing An Exception1:47
Handling exceptions with a MessageBox is a solid way to keep the user in the loop instead of letting the app fail silently.
Error Fixing Session #01 - Proper Execution Flow4:09
This segment is a great lesson in Defensive Programming. By checking the directory exists and reordering the logic, we ensure the UI stays in a consistent state even when external factors (like a missing folder) go wrong.
Some Debugging + File Load Optimization3:23
Another "sequence bug" caught in the act! A classic developer rite of passage: realizing your Clear() method is being a bit too efficient and wiping out the data you just assigned. Loading the file contents once to keep the app snappy.
Exception Handling
Clicking On Save + More Debugging2:45
Implementing the event handler when clicking the save button.
Serialization Start + Front Matter Variable1:58
The "Save" logic is taking shape! We're collecting all disparate UI fields and packaging them back into the FrontMatterData object. Keeping the resulting YAML clean and relevant.
Serialize Yaml + Temp File Name2:25
Using a temporary "staging" folder is a classic developer safety move. It’s essentially a "sandbox" where you can verify your serialization logic without the risk of wiping out your original blog posts
Writing Data To File1:28
Using a StreamWriter to write the serialized data is the standard way to ensure the resulting file is perfectly compatible with static site generators

Section Objective0:09
Installing Visual Studio 2026 (Community Edition)2:57
We're downloading and upgrading to Visual Studio 2026.
Upgrading The Solution To .NET 10.01:16
Fixing Missing Staging Folder And StreamWriter Flush4:20
The application crashes when the default staging folder is missing. We're adding code to create the folder is created if it doesn't exist.
Select Allowed Extensions7:58
When adding files, we're filtering them by a list of allowed extensions.
Combining File Paths4:32
Following best coding practices, we replace hardcoded file paths with Path.Combine calls.
File Contents Improvements4:06
Fixed the file content load order and added scrolling to the file contents text box.
Filtering Files By Extension5:58
We’re adding a list of allowed file extensions to use as a filter.
Drag & Drop Files10:16
Clearing Files List (with Confirmation)6:02
We’re adding a button that lets users clear the file list, with a confirmation dialog to prevent accidental actions.
Replacing Desktop Hardcoded Paths2:49
Replaced hardcoded desktop paths with dynamic path handling.

New App! - Fractal Graphics Drawing0:18
Starting from this section, we'll be developing a new app - a Fractals Drawing App.
Seting Up The Main Window8:48
We set up the window where we will paint the graphics.
Rendering The First Version7:48
Drawing the very first version of the Mandelbrot fractal.
Initial Adjustments And Optimization2:37
We make the initial adjustments to the algorithm and optimize it to make it just a bit faster.
Refactoring Member Variables1:54
We're refactoring some member variables for more clarity.
The Problem With SetPixel3:44
The LockBits Optimization8:05
Benchmarking Versions: Slow vs LockBits4:22
Comparing the initial SetPixel version (slow) with the LockBits version (fast).
Parallel Rendering2:32
Speed up the rendering algorithm using Parallel.For (multi-threaded).
Fractal Editor6:53
Building the editor for the Mandelbrot fractal values.
The Mandelbrot Class (Separating The Fractal Data)4:56
Adding a separate fractal class - Mandelbrot - to contain fractal related data. Separation of concerns.
Editor Base Class5:50
We define a common base class for all editors to streamline loading from and saving to a Mandelbrot fractal instance.

Requirements

Mandatory: Install Microsoft Visual Studio 2022/2026 (with C# and .NET support)
Basic C# syntax (variables, loops, conditions, etc.)
Basic understanding of Object-Oriented Programming (constructors, classes, methods, public/private, static, etc.)
Familiarity with Microsoft Visual Studio interface
(Optional) A GitHub account for version control and project sharing
Desire to build with windows forms in C#
Commitment to code alongside the lessons (hands-on work)
Any text editor (Notepad, OneNote, or similar) for writing down key concepts
Curiosity to solve C# code challenges and C# tutorials

Description

Tired of building simple console apps? It's time to build real-world software. In this course, we create Windows desktop applications from scratch, using C# and .NET 10.

You will learn:

Windows Forms with C#
Desktop Application Development
Building C# Projects
YAML parsing in C#

**2026 UPDATES - What's New?**:

March 2026:

Uploaded missing English captions
Uploaded 6 New Lectures to the Fractal Graphics App

February, 2026:

Upgrade to latest version of Visual Studio 2026 and .NET 10.0
Added 8 New Lectures - Upgrades To The YAML Parser App
Added 6 New Lectures (NEW APP!) - Graphics App (Fractals Painter)
More lectures coming soon, for both Yaml and Fractals Apps

Windows Forms is still the fastest way to turn a C# idea into a high-performance desktop application.

Here, you can learn to build Windows Forms apps to manage your work tools.

Why should you still learn to build Windows Forms apps in 2026? Because speed matters.

Windows Forms is a mature, stable framework that works well with modern .NET, making it a reliable choice for long-term projects.

Where to start?

If you don't know where to start, begin by creating projects. This way, you learn enough and reach a basic level of understanding in developing desktop apps with C# and .NET 10.

Most CS students feel they can't program until things suddenly start to click. C# is the language you must be comfortable with first.

If you are stuck in tutorial hell, the best thing you can do is to start building something. Start with a silly project. Open up the IDE and wire it up. See how things work end to end, how they connect.

This is the game you should be playing instead of taking course after course.

Also, try not to use AI while learning, because you learn by doing, not by watching.

Your skills grow by following along with what you watch on the screen, and trying things out and fixing the errors.

Using Visual Studio, an IDE from Microsoft, you can simply drag, drop, and code. It is perfect for developers who just want to build functional tools and Windows applications fast, without unnecessary overhead.

In this course, you will use the Visual Studio to create custom tools. This course is a direct route to C# desktop development. It is the place to start.

What you learn by enrolling:

Rapid C# Application Development: Build C# Desktop applications quickly
Object Oriented Programming concepts in C#
Project Based: Create a customizable YAML Parser App and a Fractals Drawing App
User Interfaces: Design and program C# user interfaces that look and feel professional.
Core Programming: Use classes, methods, and event-driven logic for windows application development.
File Handling: Use standard Windows dialogs and Visual Studio to browse, load, read, and write files.
YAML Integration: Parse and manipulate YAML data for a C# desktop application.
Dependency Management: Install and manage NuGet packages to extend your C# app functionality.
Debugging: Use Visual Studio (2022/2026) to find and fix errors in your desktop apps.
Code Quality: Use professional coding habits to build desktop applications that are easy to read and update.
Frameworks: Use .NET Core for windows desktop application development on the latest platform.

What get by enrolling:

Lifetime access to course
Fast response in Q&A
Learn by doing
Certificate of completion from Udemy

Why take this course and not others?

Each project builds upon the previous in complexity.

The first project is more beginner-friendly oriented, especially the first two sections.

After that, the difficulty begins to gradually increase.

The second application (fractals drawing app) is more complex by design and it expects you to already know how to manage windows forms and use the UI designer.

The course is easier to understand for someone with a bit of background in computer science.

If you skip this course, you’ll miss out on:

Practical Growth: A clear path to getting better at c# desktop application development and C# GUI programming by actually building, not just watching.
A Finished Project: The experience of building a complete C# app—a functional YAML Parser—from the first line of code to the final build.
The Workflow: A look at my personal step-by-step process for windows application development so you can work faster and smarter.
Solid Foundations: A chance to sharpen your Object-Oriented Programming (OOP) and write code that is clean, organized, and easy to maintain.
Real-World Skills: Learning how to build desktop applications for windows with C# and .NET Core in a way that’s hands-on and actually enjoyable.

Why learn with me (Dan)?

No-fluff policy: I respect your time, every lecture gets straight to the point and is as focused as possible
Career-focused: I focus on what’s important for your growth in developing desktop applications with C-Sharp on Windows
Clarity first: Each lesson is designed to be clear, easy to understand, and simple to follow
Shape the curriculum: You can help guide the course by suggesting a C# desktop development topic
Structured learning: Each lesson builds on the last, ensuring a smooth path through windows application development.
Practical results: My goal is to help you build desktop applications for windows with CSharp and .NET by using a logical, step-by-step sequence with object oriented programming concepts (C# and OOP design)
My Experience: I'm a professional software developer with over 10+ years in desktop software development (mostly desktop)

More content is on the way!

I am currently editing 10+ additional lectures to expand the projects with more advanced concepts and dive deeper into the course topics.

We're focusing on:

polishing the code
upgrading existing features
adding new functionality
making the apps more robust
localization - making the app available in multiple languages

These updates will be rolled out by the end of March 2026.

By enrolling now, you get full access to the current curriculum and all upcoming updates automatically.

Let’s start your growth journey together — Enroll now, see you inside!

Who this course is for:

Beginners who want to start building Windows Desktop Apps with C# and OOP in Visual Studio
Students preparing for jobs or internships that require C# hands-on knowledge
C# learners who want to strengthen their object-oriented programming skills
Learners who want to understand user interface design through real, hands-on example
Developers who want to create interactive desktop apps
Anyone curious about creating custom windows tools
Hobbyists who want to build personal productivity tools and apps
Developers familiar with another language who want to pick up C# quickly

Smart C# App Development For Windows Desktop (.NET 10)

What you'll learn

Explore related topics

Course content

Course Introduction1 lecture • 3min

YAML Application Foundation10 lectures • 24min

YAML Application Logic7 lectures • 17min

Serializing And Deserializing YAML Data16 lectures • 42min

Building A Responsive User Interface (With Layouts)5 lectures • 31min

Upgrades, New Features And Fixes11 lectures • 50min

Fractals Graphics App12 lectures • 58min

Requirements

Description

Who this course is for: