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Buffer.ByteLength Method

Returns the number of bytes in the specified array.

Namespace:  System
Assembly:  mscorlib (in mscorlib.dll)

public static int ByteLength(
	Array array
)

Parameters

array
Type: System.Array

An array.

Return Value

Type: System.Int32
The number of bytes in the array.

ExceptionCondition
ArgumentNullException

array is null.

ArgumentException

array is not a primitive.

OverflowException

array is larger than 2 gigabytes (GB).

The following code example illustrates the use of the ByteLength method to return the number of bytes in an array.

// Example of the Buffer.ByteLength method. 
using System;

class ByteLengthDemo
{
    const string formatter = "{0,10}{1,20}{2,9}{3,12}";

    public static void ArrayInfo( Array arr, string name )
    {
        int byteLength = Buffer.ByteLength( arr );

        // Display the array name, type, Length, and ByteLength.
        Console.WriteLine( formatter, name, arr.GetType( ), 
            arr.Length, byteLength );
    }

    public static void Main( )
    {
        byte[ ]   bytes   = { 1, 2, 3, 4, 5, 6, 7, 8, 9, 0 };
        bool[ ]   bools   = { true, false, true, false, true };
        char[ ]   chars   = { ' ', '$', '\"', 'A', '{' };
        short[ ]  shorts  = { 258, 259, 260, 261, 262, 263 };
        float[ ]  singles = { 1, 678, 2.37E33F, .00415F, 8.9F };
        double[ ] doubles = { 2E-22, .003, 4.4E44, 555E55 };
        long[ ]   longs   = { 1, 10, 100, 1000, 10000, 100000 };

        Console.WriteLine( 
            "This example of the Buffer.ByteLength( Array ) " +
            "\nmethod generates the following output.\n" );
        Console.WriteLine( formatter, "Array name", "Array type", 
            "Length", "ByteLength" );
        Console.WriteLine( formatter, "----------", "----------", 
            "------", "----------" );

        // Display the Length and ByteLength for each array.
        ArrayInfo( bytes, "bytes" );
        ArrayInfo( bools, "bools" );
        ArrayInfo( chars, "chars" );
        ArrayInfo( shorts, "shorts" );
        ArrayInfo( singles, "singles" );
        ArrayInfo( doubles, "doubles" );
        ArrayInfo( longs, "longs" );
    }
}

/*
This example of the Buffer.ByteLength( Array )
method generates the following output.

Array name          Array type   Length  ByteLength
----------          ----------   ------  ----------
     bytes       System.Byte[]       10          10
     bools    System.Boolean[]        5           5
     chars       System.Char[]        5          10
    shorts      System.Int16[]        6          12
   singles     System.Single[]        5          20
   doubles     System.Double[]        4          32
     longs      System.Int64[]        6          48
*/

.NET Framework

Supported in: 4.5.2, 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone 8, Silverlight 8.1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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