The example given below demonstrates how to implement the
above mentioned functionality.
Listing 1
Imports System.Security.Cryptography
Public Class ArrayUtilities
Private Random As RNGCryptoServiceProvider = New RNGCryptoServiceProvider
Private Bytes(4) As Byte
Public Function ShuffleArray(ByVal argArr As Array) As Array
Dim arr1 As New ArrayList(argArr)
'' Creating an array of Objects having the same dimension as the argument Array.
Dim arr2 As Array = Array.CreateInstance(GetType(Object), arr1.Count)
Dim intIndex As Integer
For i As Integer = 0 To arr1.Count - 1
'' intIndex is a random number between 0 and arr1.Count-1
intIndex = GenerateRandomNumber(arr1.Count)
arr2(i) = arr1(intIndex)
arr1.RemoveAt(intIndex)
Next
arr1 = Nothing
Return arr2
End Function
Private Function GenerateRandomNumber(ByVal argMax As Integer) As Integer
If argMax <= 0 Then Throw New Exception
Random.GetBytes(Bytes)
Dim intValue As Integer = (BitConverter.ToInt32(Bytes, 0)) Mod argMax
If intValue < 0 Then intValue = -intValue
Return intValue
End Function
End Class
Module TestModule
Sub Main()
Dim AU As ArrayUtilities
AU = New ArrayUtilities
Dim OriginalArray As Integer() = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}
Dim ShuffledArray As Array = AU.ShuffleArray(OriginalArray)
Dim i As Integer
Dim stb As New System.Text.StringBuilder
stb.Append("OriginalArray = {0, 1, 2, 3, 4, 5, 6, 7, 8, 9}")
stb.Append(vbCrLf)
stb.Append("ShuffledArray = {")
For i = 0 To ShuffledArray.Length - 2
stb.Append(ShuffledArray(i).ToString)
stb.Append(", ")
Next
stb.Append(ShuffledArray(ShuffledArray.Length - 1).ToString)
stb.Append("}")
Console.Write(stb.ToString)
Console.Read()
End Sub
End Module 
