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

Concatenates two specified instances of String.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)
Syntax
Public Shared Function Concat ( _
	str0 As [%$TOPIC/a6d350wd_en-us_VS_110_2_0_0_0_0%], _
	str1 As [%$TOPIC/a6d350wd_en-us_VS_110_2_0_0_0_1%] _
) As [%$TOPIC/a6d350wd_en-us_VS_110_2_0_0_0_2%]
public static [%$TOPIC/a6d350wd_en-us_VS_110_2_0_1_0_0%] Concat(
	[%$TOPIC/a6d350wd_en-us_VS_110_2_0_1_0_1%] str0,
	[%$TOPIC/a6d350wd_en-us_VS_110_2_0_1_0_2%] str1
)
public:
static [%$TOPIC/a6d350wd_en-us_VS_110_2_0_2_0_0%]^ Concat(
	[%$TOPIC/a6d350wd_en-us_VS_110_2_0_2_0_1%]^ str0, 
	[%$TOPIC/a6d350wd_en-us_VS_110_2_0_2_0_2%]^ str1
)
static member Concat : 
        str0:[%$TOPIC/a6d350wd_en-us_VS_110_2_0_3_0_0%] * 
        str1:[%$TOPIC/a6d350wd_en-us_VS_110_2_0_3_0_1%] -> [%$TOPIC/a6d350wd_en-us_VS_110_2_0_3_0_2%]

Parameters

str0
Type: SystemString

The first string to concatenate.

str1
Type: SystemString

The second string to concatenate.

Return Value

Type: SystemString
The concatenation of str0 and str1.
Remarks

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

An Empty string is used in place of any null argument.

Examples

The following example concatenates a person's first, middle, and last name.

Public Class ConcatTest
    Public Shared Sub Main()
        Dim fName As String = "Simon" 
        Dim mName As String = "Jake" 
        Dim lName As String = "Harrows" 

        ' We want to simply quickly add this person's name together. 
        ' Because we want a name to appear with a space in between each name,  
        ' we put a space on the front of the middle, and last name, allowing for 
        ' the fact that a space may already be there.
        mName = " " + mName.Trim()
        lName = " " + lName.Trim()

        ' This line simply concatenates the two strings.
        Console.WriteLine("Welcome to this page, '{0}'!", _
                          String.Concat(String.Concat(fName, mName), lName))
    End Sub 
End Class 
' The example displays the following output: 
'       Welcome to this page, 'Simon Jake Harrows'!
using System;

public class ConcatTest {
    public static void Main() {

        // we want to simply quickly add this person's name together 
        string fName = "Simon";
        string mName = "Jake";
        string lName = "Harrows";

        // because we want a name to appear with a space in between each name,  
        // put a space on the front of the middle, and last name, allowing for 
        // the fact that a space may already be there
        mName = " " + mName.Trim();
        lName = " " + lName.Trim();

        // this line simply concatenates the two strings
        Console.WriteLine("Welcome to this page, '{0}'!", string.Concat( string.Concat(fName, mName), lName ) );
    }
}
// The example displays the following output: 
//        Welcome to this page, 'Simon Jake Harrows'!
using namespace System;
int main()
{

   // we want to simply quickly add this person's name together
   String^ fName = "Simon";
   String^ mName = "Jake";
   String^ lName = "Harrows";

   // because we want a name to appear with a space in between each name,  
   // put a space on the front of the middle, and last name, allowing for 
   // the fact that a space may already be there
   mName = String::Concat(  " ", mName->Trim() );
   lName = String::Concat(  " ", lName->Trim() );

   // this line simply concatenates the two strings
   Console::WriteLine( "Welcome to this page, '{0}'!", String::Concat( String::Concat( fName, mName ), lName ) );
}
// The example displays the following output: 
//        Welcome to this page, 'Simon Jake Harrows'!
Version Information

.NET Framework

Supported in: 4.6, 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

Supported in: Windows Phone 8.1

Supported in: Windows Phone Silverlight 8.1

Supported in: 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.