File.Copy Method (String, String)
[ 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 not allowed.
Assembly: mscorlib (in mscorlib.dll)
Parameters
- sourceFileName
- Type: System.String
The file to copy.
- destFileName
- Type: System.String
The name of the destination file. This cannot be a directory or an existing file.
| 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 Nothing. |
| 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. |
Version Notes
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.