Bug fixes
#3543 Include format in Field, Fields, Infer.Field FieldsDescriptor in a backwards binary compatible way
6.4.1 introduced an additional string format property to the constructors of Field, Fields, Infer.Field and FieldsDescriptor. Unfortunately, these were added in a binary breaking change, and slipped through into the 6.4.1 release. One of the core tenets of the client is to maintain binary compatibility across a major version of the client.
6.4.2 introduces format in a binary backward compatible way, fixing the issue with 6.4.1. The 6.4.1 package has been unlisted in nuget, and we recommend upgrading to the latest version of the client as soon as possible.