.NET Framework Class Library
StringConcat Method (String, String, String, String)

Concatenates four specified instances of String.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)
Syntax
Public Shared Function Concat ( _
	str0 As [%$TOPIC/0eafbze3_en-us_VS_110_2_0_0_0_0%], _
	str1 As [%$TOPIC/0eafbze3_en-us_VS_110_2_0_0_0_1%], _
	str2 As [%$TOPIC/0eafbze3_en-us_VS_110_2_0_0_0_2%], _
	str3 As [%$TOPIC/0eafbze3_en-us_VS_110_2_0_0_0_3%] _
) As [%$TOPIC/0eafbze3_en-us_VS_110_2_0_0_0_4%]
public static [%$TOPIC/0eafbze3_en-us_VS_110_2_0_1_0_0%] Concat(
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_1_0_1%] str0,
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_1_0_2%] str1,
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_1_0_3%] str2,
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_1_0_4%] str3
)
public:
static [%$TOPIC/0eafbze3_en-us_VS_110_2_0_2_0_0%]^ Concat(
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_2_0_1%]^ str0, 
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_2_0_2%]^ str1, 
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_2_0_3%]^ str2, 
	[%$TOPIC/0eafbze3_en-us_VS_110_2_0_2_0_4%]^ str3
)
static member Concat : 
        str0:[%$TOPIC/0eafbze3_en-us_VS_110_2_0_3_0_0%] * 
        str1:[%$TOPIC/0eafbze3_en-us_VS_110_2_0_3_0_1%] * 
        str2:[%$TOPIC/0eafbze3_en-us_VS_110_2_0_3_0_2%] * 
        str3:[%$TOPIC/0eafbze3_en-us_VS_110_2_0_3_0_3%] -> [%$TOPIC/0eafbze3_en-us_VS_110_2_0_3_0_4%]

Parameters

str0
Type: SystemString

The first string to concatenate.

str1
Type: SystemString

The second string to concatenate.

str2
Type: SystemString

The third string to concatenate.

str3
Type: SystemString

The fourth string to concatenate.

Return Value

Type: SystemString
The concatenation of str0, str1, str2, and str3.
Remarks

The method concatenates str0, str1, str2, and str3; it does not add any delimiters.

An Empty string is used in place of any null object in the array.

Examples

The following example defines an array of four-letter words and stores their individual letters to a string array in order to scramble them. It then calls the Concat(String, String, String, String) method to reassemble the scrambled words.

Imports System.Collections

Module Example
   Public Sub Main()
      Const WORD_SIZE As Integer = 4

      ' Define some 4-letter words to be scrambled. 
      Dim words() As String = { "home", "food", "game", "rest" }
      ' Define two arrays equal to the number of letters in each word. 
      Dim keys(WORD_SIZE) As Double 
      Dim letters(WORD_SIZE) As String 
      ' Initialize the random number generator. 
      Dim rnd As New Random()

      ' Scramble each word. 
      For Each word As String In words
         For ctr As Integer = 0 To word.Length - 1
            ' Populate the array of keys with random numbers.
            keys(ctr) = rnd.NextDouble()
            ' Assign a letter to the array of letters.
            letters(ctr) = word.Chars(ctr)
         Next    
         ' Sort the array. 
         Array.Sort(keys, letters, 0, WORD_SIZE, Comparer.Default)      
         ' Display the scrambled word. 
         Dim scrambledWord As String = String.Concat(letters(0), letters(1), _
                                                     letters(2), letters(3))
         Console.WriteLine("{0} --> {1}", word, scrambledWord)
      Next  
   End Sub 
End Module  
' The example displays output like the following: 
'       home --> mheo 
'       food --> oodf 
'       game --> aemg 
'       rest --> trse
using System;
using System.Collections;

public class Example
{
   public static void Main()
   {
      const int WORD_SIZE = 4;

      // Define some 4-letter words to be scrambled. 
      string[] words = { "home", "food", "game", "rest" };
      // Define two arrays equal to the number of letters in each word. 
      double[] keys = new double[WORD_SIZE];
      string[] letters = new string[WORD_SIZE];
      // Initialize the random number generator.
      Random rnd = new Random();

      // Scramble each word. 
      foreach (string word in words)
      {
         for (int ctr = 0; ctr < word.Length; ctr++)
         {
            // Populate the array of keys with random numbers.
            keys[ctr] = rnd.NextDouble();
            // Assign a letter to the array of letters.
            letters[ctr] = word[ctr].ToString();
         }   
         // Sort the array. 
         Array.Sort(keys, letters, 0, WORD_SIZE, Comparer.Default);      
         // Display the scrambled word. 
         string scrambledWord = String.Concat(letters[0], letters[1], 
                                              letters[2], letters[3]);
         Console.WriteLine("{0} --> {1}", word, scrambledWord);
      } 
   }
}
// The example displays output like the following: 
//       home --> mheo 
//       food --> oodf 
//       game --> aemg 
//       rest --> trse
Version Information

.NET Framework

Supported in: 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Portable Class Library

Supported in: Portable Class Library

.NET for Windows Store apps

Supported in: Windows 8

.NET for Windows Phone apps

Supported in: Windows Phone 8.1, Windows Phone Silverlight 8.1, Windows Phone Silverlight 8
Platforms

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.