C# System.IO

C# System.IO is a namespace that stands for Input and output. In other words, we can say that C# takes input from the user and then performs the appropriate action to generate the output. i.e. C# System.IO simply processes the input and generates the output. C# System.IO namespace consists of various classes, delegates, structures, and enumerations. These classes are used to write or read the data from files and data streams.
In this tutorial, to understand the C# namespace in detail, we are going to discuss its classes, delegates, structures, and enumerations.

C# System.IO Classes

Below is the list of various classes supported by C# System.IO namespace

• BinaryReader: This class is used to read the primitive data types in binary format.
• BinaryWriter: This class is used to write the primitive data types in binary format to streams.
• File: This class provides various methods to be performed on file like create, delete, copy, rename, move, etc.
• FileInfo: This class is used to provide information about the file like properties and methods for creating, deleting, copying, and opening files.
• FileFormatException: This class is used to handle the format exception.
• FileNotFoundException: This class is used to handle the not found exception.
• FileLoadException: This class is used to handle the load exception.
• FileSystemInfo: This class is used to show information about the system by providing a base class for FileInfo and DirectoryInfo objects.
• FileStream: This class provides a stream for the file. It supports both synchronous and asynchronous read write operations.
• FileSystemEventArgs: This class is used to provide the data for directory events.
• FileSystemWatcher: This class is used to raise the event when changes in the file or directory occur.
• Directory: This is a sealed class that represents a static method for creating, enumerating, and deleting through a directory and their subdirectories.
• DirectoryInfo: This is a sealed class that represents instance methods for creating, enumerating, and deleting through a directory and their subdirectories.
• DirectoryNotFoundException: This class is used to raise an exception when a file or directory cannot be found.
• DriveInfo: This class is used to access the drive information.
• DriveNotFoundException: This class is used to raise the exception when the drive cannot ve found.
• BufferedStream: This is a sealed class used to add buffering in read and write operations.
• EndOfStreamException: This class is used to raise the exception when the end of the stream cannot be found.
• IOException: This class is used to raise the exception when the input/output error occurred.
• InvalidDataException: This class is used to raise the exception when valid data cannot be found.
• InternalBufferOverflowException: This class is used to handle internal buffer overflow exception.
• MemoryStream: This class is used to create a stream whose backing store is memory.
• Stream: This is an abstract class used to provide a stream of bytes.
• StreamReader: This class is used to read the character from bye stream by inheriting the TextReader class.
• TextReader: This class is used to read the characters sequentially.
• TextWriter: This class is used to the writer the character in a sequential manner.
• StringReader: This class is used to read the data from string by inheriting the TextReader class.
• StringWriter: This class is used to write the data to a string by inheriting the TextWriter class.
• Path: This class is used to operate on a string that contains the path information about files or directories.
• PipeException: This class is used to hand the exception related to a pipe.
• PathTooLongException: This class is used to raise the exception when the path of a file or directory is too long.
• UnmanagedMemoryStream: This class is used to access the unmanaged blocks of memory from managed code
• UnmanagedMemoryAccessor: This class is used to provide random access to the unmanaged blocks of memory from managed code.

Delegates and Structures

Below is the list of delegates and Structures supported by C# System.IO namespace.

C# System.IO Delegates

• ErrorEventHandler: It is used to define a method that controls the error event created by the FileSystemWatcher object.
• RenamedEventHandler: It is used to define a method that controls the renamed event created by the FileSyatemWather class.
• FileSystemEventHandler: It is used to define a method that controls created, changed, or deleted events create by the FileStreamWatcher class.

C# System.IO Structures

• WaitForChangedResult: It is used to show the details on the changes that occurred in the file.

C# System.IO Enumeration

Below is the list of various enumeration supported by C# System.IO namespace

• FileAccess: It is used to declare the constant to restrict the file access like read, write, open, etc
• FileMode: It is used to define the file mode, i.e. how the operating system will open the specific file.
• FileOptions: It is used to represent various options to create the object for FileStream.
• FileAttributes: It is used to provide attributes for file and their directories.
• FileShare: It is used to control the kind of access other file stream objects can have to the same file.
• SearchOption: It enables the search options to search the current directory and subdirectories.
• DriveType: It is used to declare the constants for drive types such as network, CDRom, etc.
• HandleInheritability: It is used to specify whether the child process can inherit an underlying handle.
• SeekOrigin
• NotifyFilters: It is used to notify the changes to a file or folder.

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