Comparing two arrays in vb.net - vb.net

Question

I need to do Reverse Intersection operation with two arrays and save the result in a different array
Eg: Array A {1, 2, 3}; Array B {1, 2, 3, 4, 5, 6} Resultant Array Should be {4, 5, 6}
I Tried out the following logic but didn't work
int k = 0;
int a[2] = {1,10};
int p[10];
int roll[10] = {1, 2, 3, 4, 5, 6, 7, 8, 9, 10};
for (int i = 0; i < 2; i++)
{
for (int j = 1; j <= 10; j++)
{
if (a[i] == roll[j])
{
break;
}
else
{
p[k] = 0;
p[k] = roll[j];
k++;
}
}
}
I need it for my vb.net project

Answer 1

I don't understand how that C# code is related to your VB.NET problem, if you only want to find integers which are in one array and not in the other, use Enumerable.Except:
Dim intsA = {1, 2, 3}
Dim intsB = {1, 2, 3, 4, 5, 6}
Dim bOnly = intsB.Except(intsA).ToArray()

Answer 2

Try something like this if you can't use Linq:
Function RevIntersect(arr1() As String, arr2() As String) As String()
Dim sResult, aux As New List(Of String)()
aux.AddRange(arr1)
aux.AddRange(arr2)
For Each elem As String In aux
If (Not arr1.Contains(elem) OrElse Not Arr2.Contains(elem)) AndAlso _
Not sResult.Contains(elem) Then
sResult.Add(elem)
End If
Next
Return sResult.ToArray()
End Function