VB.NET - Find Common Items Between 2 Arrays

To get an array of common items between 2 arrays, use the .Intersect method off of the first array.

i.e.:

Dim strSimilarities As String()
Dim strUserGroups As String()
Dim strOrgGroups As String()

strSimilarities = strUserGroups.Intersect(strOrgGroups).ToArray()