System.Array

Overview

The Array class provides methods for creating, manipulating, searching, and sorting arrays, as well as for retrieving the Length and lower bound of each dimension.

int[] numbers = new int[5];
Array.Sort(numbers);
int length = numbers.Length;

Constructors

Signature	Description
Array.CreateInstance(Type, int)	Creates a one-dimensional array of the specified type and length.
Array.CreateInstance(Type, int[])	Creates a multidimensional array of the specified type and dimensions.

Methods

Method	Signature	Returns	Description
Copy	Copy(Array, Array, int)	void	Copies a range of elements from one array to another.
Sort	Sort(Array)	void	Sorts the elements in an entire one-dimensional array using the `IComparable` implementation of each element.
IndexOf	IndexOf(Array, Object)	int	Searches for the specified object and returns the index of its first occurrence.
Reverse	Reverse(Array)	void	Reverses the order of the elements in the entire one-dimensional array.
FindAll	FindAll(Array, Predicate<Object>)	Array	Returns an array containing all the elements that match the conditions defined by the specified predicate.

Properties

Property	Type	Description
Length	int	Gets the total number of elements in all dimensions of the Array.
LongLength	long	Gets a 64-bit integer that represents the total number of elements in all dimensions of the Array.
Rank	int	Gets the number of dimensions of the Array.

Examples

// Create a two‑dimensional array of integers
int[,] matrix = new int[3, 3];
int counter = 1;
for (int i = 0; i < matrix.GetLength(0); i++)
{
    for (int j = 0; j < matrix.GetLength(1); j++)
    {
        matrix[i, j] = counter++;
    }
}
Console.WriteLine($"Rows: {matrix.GetLength(0)}, Columns: {matrix.GetLength(1)}");