I've fixed the lc.exe issue, by reinstalling VS 2008.  Previously, I was getting a 'lc.exe' missing error when building Web Apps but not when building web sites.  Now it is working for both Web sites, and Web Apps.  also,  I simply re-created the samples in asp.net 3.5, and it works great. 

 One other question:  When i add a reference in Visual Studio to a component (ultrawebtab for example.)  It shows the following:  Component Name: Infragistics35.WebUI.UltraWebToolbar;  Version: 8.2.20082.1000;  Runtime: v2.0.50727; Path: C:\Program Files\Infragistics\NetAdvantage for .NET 2008 Vol. 2 CLR 3.5\ASP.NET\Bin\Infragistics35.WebUI.UltraWebTab.v8.2.dll.  So, WHY is the Runtime still 2.0???  I installed the 3.5 runtime version of Infragistics controls.  Or is this correct?

(I'm using the trial version by the way.)

I did install the NetAdvantage_Samples_20083 after installed the CLR 3.5 version. I just installed the CLR 2.0 version, but the sample folder still cannot be found in the folder you mentioned. I checked the previous version of 2006 vol 3, and there is sample folder under that directory. Please advice. Thanks

Are you running Vista?  I am not sure what the deal could be, unless there is a permissions issue? 

I am using Windows XP professional. I have admin right. But the sample folder is still not available. The file I downloaded from Infragistics is NetAdvantageWebClient20083.zip. Anyway still does not work.

On Windows XP, you should be able to find the samples in the following location once installed:

C:\Documents and Settings\All Users\Documents\Infragistics\NetAdvantage for .NET 2008 Vol. 3 CLR 2.0\Samples\ASP.NET

This folder may be opened as a Web Site in Visual Studio 2005 or Visual Studio 2008.

Thanks. I found the sample files under the folder you specified.