VSTO Recurring appointments in Outlook

Doing a small Visual Studio for Office based Outlook plug-in. I stumbled over the following problem with recurring appointments

The standard approach is to do the following to include recurring appointments into your resultset.

string searchfilter1 =
string.Format("[Start] >= '{0}' AND [Start] < '{1}'","01/11/2004", "01/12/2006");
Outlook.Items result1 = calendar.Items.Restrict(searchfilter1);
result1.Sort("[Start]", false);
result1.IncludeRecurrences = true;
The problem that I ran into was that only appointments created within the span of my restriction showed up. So when searching for appointments in November a recurring appointment created before November did not show up.

Remembering the fact that searches are fast and item retrieval is slow I came up with the following solution.

string searchfilter1 =
string.Format("[Start] >= '{0}' AND [Start] < '{1}'","01/01/2004", "01/12/2006");
Outlook.Items result1 = calendar.Items.Restrict(searchfilter1);
result1.Sort("[Start]", false);
result1.IncludeRecurrences = true;
string searchfilter2 =
string.Format("[Start] >= '{0}' AND [Start] < '{1}'","01/11/2004", "01/12/2006");
Outlook.Items result2 = result1.Restrict(searchfilter2);

result2.Sort("[Start]", false);
result2.IncludeRecurrences = true;
Basically I searched back a couple of years and then applied my real search criteria to the resultset.