A qualified reference to a type uses a qualifier that looks like a package name. The type cannot be found in the package, or the package cannot be found. This can occur when the assembly that provides the type for the package is not referenced.

To correct this error

Make sure the type exists in the package provided.
Make sure that the /autoref option is turned on or that assemblies are referenced explicitly using the /reference option.

To correct this error

See Also

Reference

Concepts

Other Resources