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Provides static methods for the creation, copying, deletion, moving, and opening of files, and aids in the creation of FileStream objects.
Assembly: System.IO (in System.IO.dll)
Thetype exposes the following members.
|Copy(String, String)||Copies an existing file to a new file. Overwriting a file of the same name is not allowed.|
|Copy(String, String, Boolean)||Copies an existing file to a new file. Overwriting a file of the same name is allowed.|
|Create(String)||Creates or overwrites a file in the specified path.|
|Create(String, Int32)||Creates or overwrites the specified file.|
|Delete||Deletes the specified file.|
|Exists||Determines whether the specified file exists.|
|GetAttributes||Gets the FileAttributes of the file on the path.|
|Move||Moves a specified file to a new location, providing the option to specify a new file name.|
|Open(String, FileMode)||Opens a FileStream on the specified path with read/write access.|
|Open(String, FileMode, FileAccess)||Opens a FileStream on the specified path, with the specified mode and access.|
|Open(String, FileMode, FileAccess, FileShare)||Opens a FileStream on the specified path, having the specified mode with read, write, or read/write access and the specified sharing option.|
|OpenRead||Opens an existing file for reading.|
|OpenWrite||Opens an existing file or creates a new file for writing.|
|ReadAllBytes||Opens a binary file, reads the contents of the file into a byte array, and then closes the file.|
|SetAttributes||Sets the specified FileAttributes of the file on the specified path.|
|WriteAllBytes||Creates a new file, writes the specified byte array to the file, and then closes the file. If the target file already exists, it is overwritten.|
Use the class for typical operations such as copying, moving, renaming, creating, opening, deleting, and appending to files. You can also use the class to get and set file attributes or DateTime information related to the creation, access, and writing of a file.
Many of the methods return other I/O types when you create or open files. You can use these other types to further manipulate a file. For more information, see specific members such as , , or Create.
Because all methods are static, it might be more efficient to use a method rather than a corresponding FileInfo instance method if you want to perform only one action. All methods require the path to the file that you are manipulating.
The static methods of the class perform security checks on all methods. If you are going to reuse an object several times, consider using the corresponding instance method of FileInfo instead, because the security check will not always be necessary.
In members that accept a path as an input string, that path must be well-formed or an exception is raised. For example, if a path is fully qualified but begins with a space, the path is not trimmed in methods of the class. Therefore, the path is malformed and an exception is raised. Similarly, a path or a combination of paths cannot be fully qualified twice. For example, "c:\temp c:\windows" also raises an exception in most cases. Ensure that your paths are well-formed when using methods that accept a path string.
In members that accept a path, the path can refer to a file or just a directory. The specified path can also refer to a relative path or a Universal Naming Convention (UNC) path for a server and share name. For example, all the following are acceptable paths:
"c:\\MyDir\\MyFile.txt" in C#, or "c:\MyDir\MyFile.txt" in Visual Basic.
"c:\\MyDir" in C#, or "c:\MyDir" in Visual Basic.
"MyDir\\MySubdir" in C#, or "MyDir\MySubDir" in Visual Basic.
"\\\\MyServer\\MyShare" in C#, or "\\MyServer\MyShare" in Visual Basic.