Base class includes the field 'X', but its type (System.Web.UI.ScriptManager) is not compatible with the type of control (System.Web.UI.ScriptManager)

Question

The full error is

The base class includes the field \'ScriptManager1\', but its type (System.Web.UI.ScriptManager) is not compatible with the type of

Answer 1

You can also solve this problem in the .vbproj file (in my case). Check for these entries:

  3.5


  3.5

This seems to also force the use of the 3.5 version DLLs.