Merging Two String Array

Below function can be used to merge two string array,This function will combine two string array into one,eleminating duplicate element.

    'Pass the Destination and Source string array that need to be merged
    Private Function MergeArray(ByVal arrDestination() As String, ByVal arrSource() As String) As String()
        Dim intElement As Integer
        Try
            For intElement = 0 To arrSource.Length - 1
                'Check if element already exist,in no Re-Dimension the Destination array and add the New element in it.
                If Array.IndexOf(arrDestination, arrSource(intElement)) = -1 Then
                    ReDim Preserve arrDestination(arrDestination.Length)
                    arrDestination(arrDestination.Length - 1) = arrSource(intElement)
                End If
            Next
'Return the Resultant mergred array
            Return arrDestination
        Catch exc As Exception
            Throw exc
        End Try
    End Function

'e.g
 Dim arrArray1() As String = {"My", "Name"}
 Dim arrArray2() As String = {"Name", "Is", "ABC"}
 'After mergin above array the fginal value in arrArray1 will be {"My,"Name", "Is", "ABC"}
 arrArray1 = MergeArray(arrArray1, arrArray2)