Question : How to merge two List?

I have two list:
List <type1> ListA()

Id  field1  field2  field3
...

For each Id in ListA, listB will return below additional field:
List <type2> ListB()
Id field4  field5
...


So my question is how to merge them to get a new list
List <type3> List C()
Id field1 .... fiedl5
...

Thanks.

Answer : How to merge two List?

Yes absolutely, uninstall and start from scratch.

Follow step by step so you dont miss anything this time.

For wss 3.0 http://www.c-sharpcorner.com/UploadFile/dpatra/103052009124559PM/1.aspx

and for sharepoint 2007

http://www.datasprings.com/Resources/ArticlesInformation/OverviewonInstallingSharepoint2007.aspx