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FileSystemWatcher Constructor (String, String)

Initializes a new instance of the FileSystemWatcher class, given the specified directory and type of files to monitor.

Namespace:  System.IO
Assembly:  System (in System.dll)
new : 
        path:string * 
        filter:string -> FileSystemWatcher

Parameters

path
Type: System.String

The directory to monitor, in standard or Universal Naming Convention (UNC) notation.

filter
Type: System.String

The type of files to watch. For example, "*.txt" watches for changes to all text files.

ExceptionCondition
ArgumentNullException

The path parameter is a null reference (Nothing in Visual Basic).

-or-

The filter parameter is a null reference (Nothing in Visual Basic).

ArgumentException

The path parameter is an empty string ("").

-or-

The path specified through the path parameter does not exist.

PathTooLongException

path is too long.

NoteNote

The component will not watch the specified directory until the Path is set, and EnableRaisingEvents is true.

The component can watch files on your personal computer, a network drive, or a remote computer.

You cannot watch a remote computer that does not have Windows NT or Windows 2000. You cannot watch a remote Windows NT 4.0 computer from a Windows NT 4.0 computer.

.NET Framework

Supported in: 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

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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