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String.Concat Method (String, String)


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Concatenates two specified instances of String.

Namespace:   System
Assembly:  mscorlib (in mscorlib.dll)

Public Shared Function Concat (
	str0 As String,
	str1 As String
) As String


Type: System.String

The first string to concatenate.

Type: System.String

The second string to concatenate.

Return Value

Type: System.String

The concatenation of str0 and str1.

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

System_CAPS_note Note

You can also use your language's string concatenation operator, such as + in C#, or & and + in Visual Basic)

, to concatenate strings.

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

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'!
Universal Windows Platform
Available since 8
.NET Framework
Available since 1.1
Portable Class Library
Supported in: portable .NET platforms
Available since 2.0
Windows Phone Silverlight
Available since 7.0
Windows Phone
Available since 8.1
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