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Join  
Method  
Converts a string array into a string with a separator string between each
String Class
System NameSpace
CF1.  Function Join ( Separator : String; ValueArray : Array of String ) : String;
CF2.  Function Join ( Separator : String; ValueArray : Array of String; Start : Integer; Count : Integer ) : String;
CF : Methods with this mark are Compact Framework Compatible
Description
A new string is built containing an interleaving of all strings in a string array ValueArray with a fixed Separator string.
 
A subset of array strings may be used by starting at Start index, for Count strings (see the second example).
Notes
Very Important : Methods in .Net treat strings as starting at 0, unlike traditional Delphi where they started at 1. Likewise arrays (our example defines an array starting at 0, but an array starting at 1 or more will still be treated as a zero-indexed array by the Join method).
Microsoft MSDN Links
System
System.String
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A simple example
program Project1;
{$APPTYPE CONSOLE}

var
  strA, strB : String;
  strArray   : Array[1..3] of String;

begin
  strA := '---';

  strArray[1] := 'Hello';
  strArray[2] := 'cruel';
  strArray[3] := 'World';

  Console.WriteLine('strA = ' + strA);

  strB := System.String.Join(strA, strArray);

  Console.WriteLine('strB = ' + strB);

  Console.ReadLine;
end.
   strA = ---
   strB = Hello---cruel---World
Using only a subset of the array strings
program Project1;
{$APPTYPE CONSOLE}

var
  strA, strB : String;
  strArray   : Array[0..6] of String;

begin
  strA := '---';

  strArray[0] := 'Zero';
  strArray[1] := 'One';
  strArray[2] := 'Two';
  strArray[3] := 'Three';
  strArray[4] := 'Four';
  strArray[5] := 'Five';
  strArray[6] := 'Six';

  Console.WriteLine('strA = ' + strA);

  // Use only array strings 2 to 4 (note that they start at 0)
  strB := System.String.Join(strA, strArray, 2, 3);

  Console.WriteLine('strB = ' + strB);

  Console.ReadLine;
end.
   strA = ---
   strB = Two---Three---Four
 
 
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