File.Copy Method (String, String)

FileCopy Method (String, String)

Copies an existing file to a new file. Overwriting a file of the same name is not allowed.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll) Version: 4.0.0.0

Syntax

public static void Copy(
	string sourceFileName,
	string destFileName
)

sourceFileName: Type: SystemString
The file to copy.
destFileName: Type: SystemString
The name of the destination file. This cannot be a directory or an existing file.

Exceptions

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 InvalidPathChars.-or- sourceFileName or destFileName specifies a directory.
ArgumentNullException	sourceFileName or destFileName is null.
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 exists.-or- An I/O error has occurred.
NotSupportedException	sourceFileName or destFileName is in an invalid format.