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String.Concat(Of T) Method (IEnumerable(Of T))

Concatenates the members of an IEnumerable(Of T) implementation.

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

'Declaration
<ComVisibleAttribute(False)> _
Public Shared Function Concat(Of T) ( _
	values As IEnumerable(Of T) _
) As String

Type Parameters

T

The type of the members of values.

Parameters

values
Type: System.Collections.Generic.IEnumerable(Of T)
A collection object that implements the IEnumerable(Of T) interface.

Return Value

Type: System.String
The concatenated members in values.

ExceptionCondition
ArgumentNullException

values is Nothing.

The method concatenates each object in values; it does not add any delimiters.

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

Concat(Of T)(IEnumerable(Of T)) is a convenience method that lets you concatenate each element in an IEnumerable(Of T) collection without first converting the elements to strings. It is particularly useful with Language-Integrated Query (LINQ) query expressions, as the example illustrates. The string representation of each object in the IEnumerable(Of T) collection is derived by calling that object's ToString method.

The following example defines a very simple Animal class that contains the name of an animal and the order to which it belongs. It then defines a List(Of T) object to contain a number of Animal objects. The Enumerable.Where extension method is called to extract the Animal objects whose Order property equals "Rodent". The result is passed to the Concat(Of T)(IEnumerable(Of T)) method and displayed to the console.

Silverlight

Supported in: 5, 4

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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