System Namespace

Overview

The System namespace is the root namespace for fundamental classes in the .NET Framework. It provides base types, exception handling, and basic utilities that are essential for building applications.

Key Types

Class	Description
Object	Base class for all .NET types.
String	Represents text as a series of Unicode characters.
Exception	Base class for all exceptions.
DateTime	Represents date and time.
Math	Provides constants and static methods for trigonometric, logarithmic, and other common mathematical functions.

Related Namespaces

System.Collections – Interfaces and classes for collections.
System.IO – Types that allow reading and writing to files and data streams.
System.Text – Encoding, decoding, and string manipulation utilities.
System.Linq – Language Integrated Query functionality.
System.Net – Networking support.
System.Threading – Concurrency and synchronization primitives.

Sample Code

using System;

class Program
{
    static void Main()
    {
        Console.WriteLine("Hello, .NET!");
        int[] numbers = {1, 2, 3, 4, 5};
        int sum = 0;
        foreach (int n in numbers)
            sum += n;
        Console.WriteLine($"Sum: {sum}");
    }
}