Delphi		Array can contain any items except files: var IntArray: array[1..100] of Integer; StringArray: array[0..10] of string; You can define the array type and use it for defining the array variables: type IntArrayType: array[1..100] of Integer; var IA1,IA2: IntArrayType; You can use any range of array index and use for it any range of any ordinal type: var StringArrayByChar: array[Char] of string; IntArrayByIntRange: array[10..19] of Integer; DoubleArrayByCharRange: array['0'..'9'] of Double; You can create multidimentional array: var Table10x10: array[1..10] of array[1..10] of Boolean; or with the same result: var Table10x10: array[1..10,1..10] of Boolean; You can access any item of any array by index: var StringArrayByChar: array[Char] of string; Table10x10: array[1..10,1..10] of Boolean; ... StringArrayByChar['G']:='Greatis Software'; Table10x10[2,6]:=True; Global array variable can be preinitialized: var Digits: array[0..9] of string = ('zero','one','two','three','four','five','six','seven','eight','nine'); Table2x2: array[1..2,1..2] of Integer = ((1,2),(2,4)); The dynamic arrays can be created: var DA: array of string; ... SetLength(DA,10); DA[9]:='Nine'; SetLength(DA,25); DA[21]:='Twenty one'; // the array is destroyed automatically, // but you can destroy it manually by // assigning nil: DA:=nil; Dynamic arrays can be multidimensional too: var Int2D: array of array of Integer; ... SetLength(Int2D,8,8);
C#		Array can contain any items: int[] intArray; string[] stringArray; Array can be initialized after creation: int[] intArray = new int[] { 1, 2, 3, 4, 5 }; Array can be create by calling the CreateInstance static method, but this array cannot be initialized during creation: int[] intArray = Array.CreateInstance(typeof(int), 5) as int[]; Arrays can be indexed only by integers. Array can be multidimensional: int [,] table = new int[2,2] {{0,1},{2,3}}; Array size cannot be changed after creation. Dynamic arrays must be realized as collections with the rich set of classes from System.Collections and System.Collections.Generic namespaces.      Arrays can be indexed only by integers. There is no easy ways to create array started from the non-zero index. The collections are the C# language feature - the dynamic arrays never were so easy in use.