VSMEF001 Importing property must have setter

A property with an [ImportAttribute] must define a setter so the export can be set on the property.

The following property definition would produce a diagnostic from this rule:

[Import]
object SomeProperty { get; } // VSMEF001 reported here

Such a property does not offer a setter and thus MEF would be unable to set the property with a value.

Fix the diagnostic by adding a setter:

[Import]
object SomeProperty { get; set; }