VB.NET - Delete duplicated rows no2

Debug by hovering over the i value, as well as trying to get the index or row 1 and row 2.

If I go over the i value, i see "0".
Then, if i go over row1, i have "A", and for row2, i have "".
So i'm assuming that the empty row at the end causes the problem by saying, Is not defined for String "A" and type 'DBNull'

Just not sure how to fix that one. Do i need to put somehting like:  if i <> ""?

I was able to make it work now:

  Function compare_row(row1 As DataGridViewRow, row2 As DataGridViewRow, len As Integer) As Boolean
        Try
            Dim temp_bool As Boolean = True
            For i = 0 To len - 1
                If Not IsDBNull(row1.Cells(i).Value) AndAlso Not IsDBNull(row2.Cells(i).Value) Then
                    temp_bool = temp_bool And (row1.Cells(i).Value = row2.Cells(i).Value)
                End If
            Next
            Return temp_bool

        Catch ex As Exception
            MsgBox("error1 in button click" + vbCrLf + ex.Message)
        End Try


    End Function

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I only now notice, you forgot to include my previous solution. I explained about that last row, and TWO solutions.
I suggest you fully read my previous full solution and try to understand fully what I said, and then add something of my code back.

I did included your previous solution at the beginning of this post. No?

I'm really sorry. I'm really trying to learn here. This is very new to me in VB.Net.
Isn't that doing it to fix the problem?

 If Not IsDBNull(row1.Cells(i).Value) AndAlso Not IsDBNull(row2.Cells(i).Value) Then
 

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Using the row.IsNewRow  check, is easier and makes your code more readable.

Thank you for your patience with me. I really appreciate it.
So based on how i understand it, i've updated the code to below:

If row1.IsNewRow = False AndAlso row2.IsNewRow = False Then

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Function compare_row(row1 As DataGridViewRow, row2 As DataGridViewRow, len As Integer) As Boolean
        Try
            Dim temp_bool As Boolean = True
            For i = 0 To len - 1
                If row1.IsNewRow = False AndAlso row2.IsNewRow = False Then
                    temp_bool = temp_bool And (row1.Cells(i).Value = row2.Cells(i).Value)
                End If
            Next
            Return temp_bool

        Catch ex As Exception
            MsgBox("error1 in button click" + vbCrLf + ex.Message)
        End Try


    End Function

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If i did understand it correctly, i'm still having : System.InvalidCastException: 'Operator '=' is not defined for string "A" and type 'DBNull'.' 

Will continue to look at it.

Thanks. Yes, you are right,  this is working.