Compare two arrays with different dimension

Question

I am trying to compare two arrays that always have different dimensions.

eg. arr1 -> {1,2,3} and arr2->{1,2}

I did try and able to get the matching items to new array. But I am expecting to get the unmatched items only

I am expecting to compare both arrays and put only the item '3' to a new array which is in arr1 and not in arr2

eg arr1 -> {1,2,3} and arr2->{1,2} should result a new array with 3 arr1 -> {1,2,3,4} and arr2->{1,2} should result a array with 3,4

Is there any way of doing this for older version of .net framework without using Enumerable.Except

Answer 1

I have done something like this. if we have two arrays called paramOld{"1","2","3"} and paramNew{"2","3"}

If paramOld.Length > paramNew.Length Then
            Dim paramDelete((paramOld.Length - paramNew.Length) - 1) As String


            Dim isFound As Boolean = False
            For i As Int32 = 0 To oldparamLenght - 1
                isFound = False
                For j As Int32 = 0 To newparamLength - 1
                    If paramOld(i) = paramNew(j) Then
                        isFound = True
                        Exit For
                    End If
                Next
                If isFound = False Then
                    paramDelete(i) = paramOld(i)
                End If
            Next
End If