Null Field
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StreamWriter.Null Field


Provides a StreamWriter with no backing store that can be written to, but not read from.

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

public static readonly StreamWriter Null

Field Value

Type: System.IO.StreamWriter

Use Null to redirect output to a StreamWriter that will not consume any operating system resources.

When the StreamWriter.Write methods are invoked on Null, the call simply returns, and no data is actually written to any backing store.

For a list of common I/O tasks, see Common I/O Tasks.

The following example demonstrates a use of the Null field.

    sw.WriteLine("The store can be written to, but not read from.");

Universal Windows Platform
Available since 4.5
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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