Error after upgrading v9.31 to v10 : type or namespace name 'ESRI' could not be found

Discussion created by zjvan on Aug 22, 2012
Latest reply on Aug 23, 2012 by zjvan

I am upgrading ArcGIS customization for ArcCatalog 9.31 from VS2008 project to VS2010 ArcCatalog v10.0 project.

VS2010 conversion results shows successfully converted.

I added the new reference to the reference and  changed the reference property "Specific Version" to False.
Rebuild the project.

I got many errors like below (more in screenshot)[ATTACH=CONFIG]17171[/ATTACH]

Error 4 Error 4 The type or namespace name 'ESRI' could not be found (are you missing a using directive or an assembly reference?)

I have tried to remove the reference and added them back.
This does not fixed it either.

I also tried to upgrade on another box. Same errors.

Any idea?