
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.

csharp.tar.gz

CSharp-Compile-Run-code

.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

## Hide

**Hiding** creates a method of the same name and signature as it it’s defined in the base class. To hide a method, we use the `new` keyword:

```C#
public new void Voice()
{
}
```

Instead of providing a method with a different implementation (overriding), the `new` keyword creates an entirely different method, but with the same name and signature. A method marked with the `new` keyword isn’t associated by any means with the base version of the method. They’re completely separate entities.


using System;

namespace MethodHiding
{
    public class Animal
    {
        // Base class has the Voice() method
        public void Voice()
        {
            Console.WriteLine("Grrrrr");
        }
    }
}

using System;

namespace MethodHiding
{
    public class Bird : Animal
    {
        // We are using the new keyword
        // to hide the Voice() method that exists in the parent class
        public new void Voice() 
        {
            Console.WriteLine("Some bird voice...");
        }
    }
}

using System;

namespace MethodHiding
{
    public class Program
    {
        public static void Main()
        {
            var animal = new Animal();
            var bird = new Bird();

            animal.Voice();
            bird.Voice();
        }
    }
}


> **Note:** We could hide the `Voice()` method above without using the `new` keyword. In that case, however, we’d receive a warning that the method we’re creating hides a base class method. To confirm that we intend to hide the method, we use the `new` keyword.

What’s the difference from overriding a method in practical terms?

We could use the `new` keyword to hide a method if the implementation in the base class doesn’t suit our needs and isn’t marked as virtual. If it isn’t virtual, then we can’t override it. We can use method hiding in such situations:


# Hide

**Hiding** creates a method of the same name and signature as it it’s defined in the base class. To hide a method, we use the `new` keyword:

```C#
public new void Voice()
{
}
```

Instead of providing a method with a different implementation (overriding), the `new` keyword creates an entirely different method, but with the same name and signature. A method marked with the `new` keyword isn’t associated by any means with the base version of the method. They’re completely separate entities.


Learn to create a new method with the same signature.

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

Hiding vs. Overriding a Method

Hide