The FileMode and FileAccess : FileStream « File Directory Stream « C# / CSharp Tutorial

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15.19.1.The FileMode and FileAccess

Value	Description
FileMode.Append	append to the end of file.
FileMode.Create	create a new output file. Any preexisting file by the same name will be destroyed.
FileMode.CreateNew	create a new output file. The file must not already exist.
FileMode.Open	open a preexisting file.
FileMode.OpenOrCreate	open a file if it exists, or create the file if it does not already exist.
FileMode.Truncate	open a preexisting file, but reduce its length to zero.

If you want to restrict access to just reading or just writing, use this constructor:

FileStream(string filename, FileMode mode, FileAccess how)

15.19.FileStream
	15.19.1.	The FileMode and FileAccess
	15.19.2.	Open a file with exception handling
	15.19.3.	Demonstrate random access file
	15.19.4.	Read every other value using FileSeek
	15.19.5.	Open an existing file
	15.19.6.	Read file stream on a per byte basis
	15.19.7.	Read file stream as an array of bytes
	15.19.8.	Write data to file through FileStream per byte
	15.19.9.	Write data to file through FileStream via an array
	15.19.10.	Reset internal position for a FileStream
	15.19.11.	Write/read bytes using FileStream
	15.19.12.	Use FileStream to read a file selected from OpenFileDialog
	15.19.13.	Use FileStream to read a file byte by byte
	15.19.14.	Use FileStream to write/read a file byte by byte
	15.19.15.	Is a stream seekable
	15.19.16.	Binary File Reading through FileStream
	15.19.17.	Text File Reading with FileStream
	15.19.18.	Write byte array with FileStream
	15.19.19.	using statement and FileStream
	15.19.20.	Move file pointer to beginning of file

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