Delphi		Set is a collection of value of the same ordinal type, maximal count of item can be no more than 256 items and orinality of any item can be between 0 and 255, so, for instance, you cannot create set of Integer: var Chars: set of Char; DigitChars: set of '0'..'9'; MainModalResultsSet: set of (mrOk,mrCancel); You can define the set type and use it for defining the set variables: type DigitCharsSet: set of '0'..'9'; var DC1,DC2: DigitCharsSet; The global set variables can be preinitialized: var DigitCharsSet: set of '0'..'9' = ['1','2','3']; You can use +, −, * and in operators to work with sets: var Digits: set of '0'..'9'; ... Digits:=Digits+['4','5']; if '1' in Digits then // do something
C#		There is no sets in C#. All we can is to create some own set class for support this functionality or try to simulate sets with enums or bit flags and logical operations.