File.Copy Method (String, String, Boolean)

[ This article is for Windows Phone 8 developers. If you’re developing for Windows 10, see the latest documentation. ]

Copies an existing file to a new file. Overwriting a file of the same name is allowed.

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

Syntax

Public Shared Sub Copy ( _
    sourceFileName As String, _
    destFileName As String, _
    overwrite As Boolean _
)

public static void Copy(
    string sourceFileName,
    string destFileName,
    bool overwrite
)

destFileName
Type: System..::.String
The name of the destination file. This cannot be a directory.

overwrite
Type: System..::.Boolean
true if the destination file can be overwritten; otherwise, false.

Exception	Condition
UnauthorizedAccessException	The caller does not have the required permission.
ArgumentException	sourceFileName or destFileName is a zero-length string, contains only white space, or contains one or more invalid characters as defined by GetInvalidPathChars. -or- sourceFileName or destFileName specifies a directory.
ArgumentNullException	sourceFileName or destFileName is nullNothingnullptra null reference (Nothing in Visual Basic).
PathTooLongException	The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters.
DirectoryNotFoundException	The path specified in sourceFileName or destFileName is invalid (for example, it is on an unmapped drive).
FileNotFoundException	sourceFileName was not found.
IOException	destFileName is read-only, or destFileName exists and overwrite is false. -or- An I/O error has occurred.
NotSupportedException	sourceFileName or destFileName is in an invalid format.

Windows Phone

This member has a SecurityCriticalAttribute attribute. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.