C# Array Class (original) (raw)

Last Updated : 31 Jan, 2025

**Array class in C# is part of the **System namespace and provides methods for creating, searching, and sorting arrays. The Array class is not part of the **System.Collections namespace, but it is still considered as a collection because it is based on the **IList interface. The Array class is the base class for language implementations that support arrays.

• The length of the array is the number of elements it holds.
• The lower bound of an Array is the index of its first element and the default value of the lower bound is 0.
• The default size of an Array is 2GB.
• Arrays of the same type share the same type or Class object.

**Example: This example demonstrates array traversal.

C# `

// C# program to demonstrates the traversal on array using System;

class Geeks { static void Main() { // Declare and initialize an array of integers int[] arr = { 10, 20, 30, 40, 50 };

    // Print each element of the array
    Console.WriteLine("Array elements are:");
    foreach(int i in arr) { 
      Console.WriteLine(i); 
    }
}

}

`

Output

Array elements are: 10 20 30 40 50

Properties

The Array class provides several properties to access its state.

**Example 1: This example demonstrates how to use the length property of an array.

C# `

// C# program to demonstrates the length of an array using System;

class Geeks {

public static void Main()
{
    // Declares a 1D array of integers
    int[] arr;

    // Allocating memory for the array
    arr = new int[] { 10, 20, 30, 40, 50, 60 };

    // Displaying the length of the array
    Console.WriteLine("Length of the array: {0}",
                      arr.Length);
}

}

`

Output

Length of the array: 6

**Example 2: This example, demonstrates how to use the Rank property to find the number of dimensions of an array and prints each element of the array.

C# `

// C# program to demonstrates the property rank of an array using System;

class Geeks {

public static void Main()
{
    // Declare and initialize a 1D array of integers
    int[] arr = { 10, 20, 30, 40, 50, 60 };

    // Display the rank (dimension) of the array
    Console.WriteLine("Rank of the array: " + arr.Rank);

    foreach(int i in arr) { 
      Console.WriteLine(i); 
    }
}

}

`

Output

Rank of the array: 1 10 20 30 40 50 60

Methods

**Example 1: This example demonstrates how to use the Array.Reverse() to reverse the elements of a one-dimensional integer array.

C# `

// C# program to demonstrates the working of Reverse() using System;

class Geeks { public static void Main() { // Declare and initialize a 1D array of integers int[] arr = { 10, 20, 30, 40, 50, 60 };

    // Display the array before reversing
    Console.WriteLine("Array before reverse:");
    foreach(int i in arr) { 
      Console.Write(i + " "); 
    }
    Console.WriteLine();

    // Using Reverse() method to reverse the array
    Array.Reverse(arr);

    // Display the array after reversing
    Console.WriteLine("Array after reverse:");
    foreach(int i in arr) { 
      Console.Write(i + " "); 
    }
    Console.WriteLine();
}

}

`

Output

Array before reverse: 10 20 30 40 50 60 Array after reverse: 60 50 40 30 20 10

**Example 2: This example, demonstrates hoe to use Array.sort() Method to sort a one-dimensional integer array in ascending order.

C# `

// C# program to demonstrates the working of Sort() using System;

class Geeks { public static void Main() { // Declare and initialize a 1D array of integers int[] arr = { 50, 20, 40, 10, 60, 30 };

    // Display the array before sorting
    Console.WriteLine("Array before sorting:");
    foreach(int i in arr) { 
      Console.Write(i + " "); 
    }
    Console.WriteLine();

    // Using Sort() method to sort the array
    Array.Sort(arr);

    // Display the array after sorting
    Console.WriteLine("Array after sorting:");
    foreach(int i in arr) { 
      Console.Write(i + " "); 
    }
    Console.WriteLine();
}

}

`

Output

Array before sorting: 50 20 40 10 60 30 Array after sorting: 10 20 30 40 50 60