
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

## Namespaces

All user-defined classes and structures, as a rule, don’t exist in a vacuum, but are enclosed in special containers called **namespaces**. The `Program` class generated by default upon the creation of a new .NET project already resides in a namespace. The name of this namespace is usually the same as the name of the project:

```C#
namespace MyFirstProject
{
	class Program
	{
		static void Main(string[] args)
		{
		}
	}
}
```
### Defining a `namespace`

A `namespace` is defined using the `namespace` keyword, followed by the name. In the example above, the full name of the `Program` class is `MyFirstProject.Program`.

The `Program` class sees all other classes defined in the same `namespace`:

```C#
namespace MyFirstProject
{
    class Program
    {
        static void Main()
        {
            Employee employee = new Employee();
        }
    }

    class Employee
    {
    }
}
```

### Importing namespaces

To use classes from other namespaces, the others must be imported with the `using` directive:

```C#
using System;
```

The above statement lets us use all classes from the `System` `namespace`, including the `Console` class that’s used to print to the console:

```C#
Console.WriteLine("Hello World!");
```

If we opt not to bring the `System` `namespace`, we have to use the full name of the class to access its members:

```C#
System.Console.WriteLine("Hello World!");
```

Consider the following code. Inspect it and make it run.


# Namespaces

All user-defined classes and structures, as a rule, don’t exist in a vacuum, but are enclosed in special containers called **namespaces**. The `Program` class generated by default upon the creation of a new .NET project already resides in a namespace. The name of this namespace is usually the same as the name of the project:

```C#
namespace MyFirstProject
{
	class Program
	{
		static void Main(string[] args)
		{
		}
	}
}
```
## Defining a `namespace`

A `namespace` is defined using the `namespace` keyword, followed by the name. In the example above, the full name of the `Program` class is `MyFirstProject.Program`.

The `Program` class sees all other classes defined in the same `namespace`:

```C#
namespace MyFirstProject
{
    class Program
    {
        static void Main()
        {
            Employee employee = new Employee();
        }
    }

    class Employee
    {
    }
}
```

## Importing namespaces

To use classes from other namespaces, the others must be imported with the `using` directive:

```C#
using System;
```

The above statement lets us use all classes from the `System` `namespace`, including the `Console` class that’s used to print to the console:

```C#
Console.WriteLine("Hello World!");
```

If we opt not to bring the `System` `namespace`, we have to use the full name of the class to access its members:

```C#
System.Console.WriteLine("Hello World!");
```

Consider the following code. Inspect it and make it run.


Learn about namespaces and their role when creating class libraries.

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

Namespaces and Class Libraries

Namespaces

Defining a `namespace`

First Assessment

Final Assessment

Namespaces and Class Libraries

Namespaces

Defining a namespace

Defining a `namespace`