This is part of the Fake.DotNet.ILMerge module. AllowDuplicateTypes Option type to configure ILMerge's processing of duplicate types. Union Cases Union CaseDescription AllPublicTypes Signature: All public types are allowed to be duplicated and renamed DuplicateTypes(string list) Signature: string list List of types to allow to be duplicated NoDuplicateTypes Signature: No duplicates of public types allowed