System.Text Namespace
Encoding
Represents a text encoding, e.g., UTF8, ASCII, Unicode.
StringBuilder
Provides a mutable string of characters for efficient modifications.
RegularExpressions
Contains classes for processing regular expressions.
UTF8Encoding
Implements UTF-8 text encoding with optional BOM handling.
UTF32Encoding
Implements UTF-32 text encoding, supporting both little and big endian.
UnicodeEncoding
Represents UTF-16 encoding, with configurable byte order.
Convert.ToBase64String
Converts an array of bytes to its equivalent Base64 string representation.