Answer / Sunny Mehrotra

"I/O classes in C# are used for reading and writing data from input devices (keyboard) or output devices (screen). Some of the commonly used I/O classes are:n
1. Console class: For simple console-based applications.
2. StreamReader and StreamWriter: For reading and writing files.
3. BinaryReader and BinaryWriter: For reading and writing binary data.
4. XmlReader and XmlWriter: For reading and writing XML documents.

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