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StringCollection.AddRange Method

Copies the elements of a string array to the end of the StringCollection.

Namespace:  System.Collections.Specialized
Assembly:  System (in System.dll)

Public Sub AddRange ( _
	value As String() _


Type: System.String()

An array of strings to add to the end of the StringCollection. The array itself can not be Nothing but it can contain elements that are Nothing.


value is Nothing.

StringCollection accepts Nothing as a valid value and allows duplicate elements.

If the StringCollection can accommodate the new elements without increasing the capacity, this method is an O(n) operation, where n is the number of elements to be added. If the capacity needs to be increased to accommodate the new elements, this method becomes an O(n + m) operation, where n is the number of elements to be added and m is Count.

The following code example adds new elements to the StringCollection.

Imports System
Imports System.Collections
Imports System.Collections.Specialized

Public Class SamplesStringCollection   

   Public Shared Sub Main()

      ' Creates and initializes a new StringCollection. 
      Dim myCol As New StringCollection()

      Console.WriteLine("Initial contents of the StringCollection:")

      ' Adds a range of elements from an array to the end of the StringCollection. 
      Dim myArr() As [String] = {"RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED"}

      Console.WriteLine("After adding a range of elements:")

      ' Adds one element to the end of the StringCollection and inserts another at index 3.
      myCol.Add("* white")
      myCol.Insert(3, "* gray")

      Console.WriteLine("After adding ""* white"" to the end and inserting ""* gray"" at index 3:")

   End Sub 'Main

   Public Shared Sub PrintValues(myCol As IEnumerable)
      Dim obj As [Object]
      For Each obj In  myCol
         Console.WriteLine("   {0}", obj)
      Next obj
   End Sub 'PrintValues

End Class 'SamplesStringCollection 

'This code produces the following output. 

'Initial contents of the StringCollection: 

'After adding a range of elements: 
'   RED 
'   orange 
'   yellow 
'   RED 
'   green 
'   blue 
'   RED 
'   indigo 
'   violet 
'   RED 

'After adding "* white" to the end and inserting "* gray" at index 3: 
'   RED 
'   orange 
'   yellow 
'   * gray 
'   RED 
'   green 
'   blue 
'   RED 
'   indigo 
'   violet 
'   RED 
'   * white 

.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
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