checking for the last element in a foreach

foreach (Object element in elements.under)
    {
        if (element  == elements.under.Last())  
        {
            //Print Code
        }
        else
        {
            //Do other thing here
        }
    }

You need to keep track of a counter and then check for last element -

int i = 1;
foreach (Object element in elements.under)
{
    if (i == elements.under.Count) //Use count or length as supported by your collection
    { 
      //last element 
    }
    else 
    { i++; }
}

this answer on so may resolve the issue you want have look to it

How do you find the last loop in a For Each (VB.NET)?

also check this library Enumerating with extra info in the Miscellaneous Utility Library

foreach (SmartEnumerable<string>.Entry entry in
                 new SmartEnumerable<string>(list))
        {
            Console.WriteLine ("{0,-7} {1} ({2}) {3}",
                               entry.IsLast  ? "Last ->" : "",
                               entry.Value,
                               entry.Index,
                               entry.IsFirst ? "<- First" : "");
        }

code based on above library link