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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 Value

Type: System.Int64
A long value representing the length of the stream in bytes.

ExceptionCondition
NotSupportedException

CanSeek for this stream is false.

IOException

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

For a list of common file and directory operations, see Common I/O Tasks.

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.");
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8
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