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FileStream.Length Property

Gets the length in bytes of the stream.

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

public override long Length { get; }
/** @property */
public long get_Length ()

public override function get Length () : long

Property Value

A long value representing the length of the stream in bytes.
Exception typeCondition

NotSupportedException

CanSeek for this stream is false.

IOException

An I/O error occurs, such as the file being closed.

The following table lists examples of other typical or related I/O tasks.

To do this...

See the example in this topic...

Create a text file.

How to: Write Text to a File

Write to a text file.

How to: Write Text to a File

Read from a text file.

How to: Read Text from a File

Append text to a file.

How to: Open and Append to a Log File

File.AppendText

FileInfo.AppendText

Rename or move a file.

File.Move

FileInfo.MoveTo

Copy a file.

File.Copy

FileInfo.CopyTo

Get the size of a directory.

FileInfo.Length

Get the attributes of a file.

File.GetAttributes

Set the attributes of a file.

File.SetAttributes

Create a subdirectory.

CreateSubdirectory

Read from a binary file.

How to: Read and Write to a Newly Created Data File

Write to a binary file.

How to: Read and Write to a Newly Created Data File

See the files in a directory.

Name

Sort files in a directory by size.

GetFileSystemInfos

The following example uses the Length and Position properties to check for an end-of-file condition.

if( s.Length==s.Position )
{
   Console.WriteLine("End of file has been reached.");
}

if (s.get_Length() == s.get_Position()) {
    Console.WriteLine("End of file has been reached.");
}

if( s.Length==s.Position )
    Console.WriteLine("End of file has been reached.");

Windows 98, Windows 2000 SP4, Windows CE, Windows Millennium Edition, Windows Mobile for Pocket PC, Windows Mobile for Smartphone, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

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

.NET Framework

Supported in: 2.0, 1.1, 1.0

.NET Compact Framework

Supported in: 2.0, 1.0
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