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In the good old Pascal days, there was a set of functions to handle the I/O (AssignFile, Reset, Rewrite, CloseFile and so on), now we've a bounce of classes. All Delphi streams inherit from TStream and can be used as an internal stream of one of the adapter classes.

There are 10 fundamental types of streams:

System.Classes. TBinaryWriter

: This is a writer for binary data

System.Classes. TStreamWriter

: This is a writer for characters to stream

System.Classes. TStringWriter

: This is a writer for a string

System.Classes. TTextWriter

: This is a writer for sequence of characters; it is an abstract class

System.Classes.TWriter

: This writes component data to an associated stream

System.Classes. TReader

: This reads component data from an associated stream

System.Classes.TStreamReader

: This is a reader for a stream of characters

System.Classes. TStringReader

: This is a reader for a string

System.Classes. TTextReader


: This is a reader for sequence of characters; it is an abstract class

System.Classes. TBinaryReader

: This is a reader for binary data