StringCollection.Clear Method removes all the strings from the StringCollection.
Imports System Imports System.Collections Imports System.Collections.Specialized Public Class SamplesStringCollection Public Shared Sub Main() Dim myCol As New StringCollection() Dim myArr() As [String] = {"RED", "orange", "yellow", "RED", "green", "blue", "RED", "indigo", "violet", "RED"} myCol.AddRange(myArr) myCol.Clear() PrintValues(myCol) 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 End Class