IsolatedStorageFile.CopyFile Method (String, String)

Copies an existing file to a new file.

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

public void CopyFile(
	string sourceFileName,
	string destinationFileName


Type: System.String

The name of the file to copy.

Type: System.String

The name of the destination file. This cannot be a directory or an existing file.


sourceFileName or destinationFileName is a zero-length string, contains only white space, or contains one or more invalid characters defined by the Path.GetInvalidPathChars method.


sourceFileName or destinationFileName is null.


The isolated store has been closed.


The isolated store has been disposed.


sourceFileName was not found.


sourceFileName was not found.


The isolated store has been removed.


Isolated storage is disabled.


destinationFileName exists.


An I/O error has occurred.

sourceFileName and destinationFileName must specify different file names. Use the IsolatedStorageFile.CopyFile(String, String, Boolean) method overload to overwrite an existing file.

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: Windows Phone Silverlight 8

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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