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String.Concat Method (Object, Object)

Concatenates the string representations of two specified objects.

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

'Declaration
Public Shared Function Concat ( _
	arg0 As Object, _
	arg1 As Object _
) As String

Parameters

arg0
Type: System.Object

The first object to concatenate.

arg1
Type: System.Object

The second object to concatenate.

Return Value

Type: System.String
The concatenated string representations of the values of arg0 and arg1.

The method concatenates arg0 and arg1by calling the parameterless ToString method of arg0 and arg1; it does not add any delimiters.

String.Empty is used in place of any null argument.

If either of the arguments is an array reference, the method concatenates a string representing that array, instead of its members (for example, "System.String[]").

The following example demonstrates the Concat method.

Class stringConcat5
   Public Shared Sub Main()
      Dim i As Integer = - 123
      Dim o As [Object] = i
      Dim objs() As [Object] = {-123, -456, -789}

      Console.WriteLine("Concatenate 1, 2, and 3 objects:")
      Console.WriteLine("1) {0}", [String].Concat(o))
      Console.WriteLine("2) {0}", [String].Concat(o, o))
      Console.WriteLine("3) {0}", [String].Concat(o, o, o))

      Console.WriteLine(vbCrLf & "Concatenate 4 objects and a variable length parameter list:")
      Console.WriteLine("4) {0}", String.Concat(o, o, o, o))
      Console.WriteLine("5) {0}", String.Concat(o, o, o, o, o))

      Console.WriteLine(vbCrLf & "Concatenate a 3-element object array:")
      Console.WriteLine("6) {0}", [String].Concat(objs))
   End Sub 
End Class 
'The example displays the following output: 
'    Concatenate 1, 2, and 3 objects: 
'    1) -123 
'    2) -123-123 
'    3) -123-123-123 
'     
'    Concatenate 4 objects and a variable length parameter list: 
'    4) -123-123-123-123 
'    5) -123-123-123-123-123 
'          
'    Concatenate a 3-element object array: 
'    6) -123-456-789

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0, 1.1

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

XNA Framework

Supported in: 3.0, 2.0, 1.0

.NET for Windows Phone apps

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

Portable Class Library

Supported in: Portable Class Library
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