System.Composition.ImportAttribute cannot be used on fields

[dnickless]

I am getting some compilation issue after updating an older codebase to System.Composition.

Is it possible that AttributeUsage.Field should be added to the declaration here?

https://github.com/dotnet/corefx/blob/dcc9f626eeb0751d4ba4499f623aac42d2e95c10/src/System.Composition.AttributedModel/src/System/Composition/ImportAttribute.cs#L13

The documentation on https://docs.microsoft.com/en-us/dotnet/api/system.composition.importattribute?view=dotnet-plat-ext-3.0 states:

Specifies that a property, field, or parameter value should be provided by the host container.

[ericstj]

The documentation is wrong. This can only be specified on properties and parameters. We should fix the docs.