Error BC30002: Type ‘XXX’ is not defined…
Error BC30466: Namespace or type 'XXX' for the Imports 'XXX' cannot be found.
Error CS0246: The type or namespace name 'XXX' could not be found…
Fatal error CS0009: Metadata file XXX.DLL could not be opened…
Name 'session' is not declared …
Need to map to server location…
The file could not be loaded into the Web Forms designer…
Unable to compile application…
Unable to edit component. Failed to parse layout file…