
Delve into .NET development with C#, covering programming fundamentals, object-oriented principles, exception handling, and multithreading. Gain hands-on experience to build cross-platform applications effectively.

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.NET is Microsoft’s free and open source framework for developing native software applications on Linux, macOS, and Windows. The power of cross-platform development allows developers to design, code, and run programs on a wide array of platforms.

This course is an introduction to developing .NET applications using C#. You’ll start start with a comprehensive review of C# and computer programming fundamentals: data types, conditionals, loops, methods, and more. You’ll then review the basics of object-oriented programming before diving into methods, exception handling, delegation, and events. With this foundation, you’ll continue building interfaces, collections, database operations, and multithreading. You’ll wrap up with process improvements using dynamic binding, garbage collection, and unmanaged resources.

By the end of this course, you’ll have hands-on experience with C# and .NET, and be ready to build applications using object-oriented programming principles on almost any platform.

Mastering C# and .NET

## Abstract classes

C# includes abstract classes in addition to the regular classes. An **abstract class** is a class that can’t be instantiated. It can hold some common functionality for its child classes.

Abstract classes are useful when we don’t want to use their instances in our program but need to store common functionality to avoid code repetition.

Let’s consider an example using the `Vehicle`, `Car`, and `Motorcycle` classes we’ve looked at before. The `Vehicle` class holds members common to all vehicles, but a vehicle is an abstract concept. Cars and motorcycles, though, are definite things.

Therefore, we can mark our `Vehicle` class as `abstract` because we won’t use its instances.

We use the `abstract` keyword to do this:


# Abstract classes

C# includes abstract classes in addition to the regular classes. An **abstract class** is a class that can’t be instantiated. It can hold some common functionality for its child classes.

Abstract classes are useful when we don’t want to use their instances in our program but need to store common functionality to avoid code repetition.

Let’s consider an example using the `Vehicle`, `Car`, and `Motorcycle` classes we’ve looked at before. The `Vehicle` class holds members common to all vehicles, but a vehicle is an abstract concept. Cars and motorcycles, though, are definite things.

Therefore, we can mark our `Vehicle` class as `abstract` because we won’t use its instances.

We use the `abstract` keyword to do this:


Learn about classes that can’t be instantiated.

Getting Started

C# Programming Basics

Classes and OOP

Classes and OOP II

Exception Handling

First Assessment

Delegates and Events

Interfaces

Additional Features

Collections

LINQ

Working with Strings

Working with Dates and Time

Multithreading and Asynchronous Programming

Reflection

Dynamic Binding

Garbage Collection and Unmanaged Resources

Final Assessment

Next Steps

Appendix

Abstract Classes

Abstract classes