VB 2010 Compare Two Treeviews and return the differences result

gistfile1.vb

'Visual Basic Online Course - Arrays
'http://www.evry1.net/VBNet/
'Compare Two Arrays and Return differences - Dec./2013 
'By/ evry1falls [Google me]

Public Class Form1
    Private Sub Form1_Load(sender As System.Object, _
    e As System.EventArgs) Handles MyBase.Load
        'Nothing to be done here
    End Sub
    
    Private Sub BtnDiff_Click(sender As System.Object, _
    e As System.EventArgs) Handles BtnDiff.Click
    
        Dim Nodes1Cnt As Integer = TRV1.Nodes.Count - 1
        Dim Nodes2Cnt As Integer = TRV2.Nodes.Count - 1
        'TextBoxes are used 
        Dim Txt1, Txt2 As New TextBox

        For I As Integer = 0 To Nodes1Cnt
            Txt1.AppendText(TRV1.Nodes(I).Text & (vbCrLf))
        Next

        For I As Integer = 0 To Nodes2Cnt
            Txt2.AppendText(TRV2.Nodes(I).Text & (vbCrLf))
        Next

        Dim Sfound As String = ""
        Dim XI As Integer = 0

        Dim Lines1 = Txt1.Lines
        Dim Lines2 = Txt2.Lines

        For Each line In Lines1
            Dim curLine As String = line
            If Lines2.Any(Function(s) s.Equals(curLine, _
            StringComparison.CurrentCultureIgnoreCase)) Then
            
                Dim Matched As String = (curLine & vbCrLf)
                'You can retrieve matches here,
                ' I.E [TextBox2.Text = Matched]
            Else
                'Return Array comparison result here
                Sfound += (curLine & vbCrLf)
            End If
        Next
        TxtDiff.Text = Sfound
    End Sub
End Class