This is the official GraphDiff package.
GraphDiff - Allows for automatic update of a graph of detached entities using Entity Framework v6+.
If you have ever felt the pain of updating a detached graph with one or more nested collections then this is for you :)
Entity Framework: BulkSaveChanges, BulkInsert, BulkUpdate, BulkDelete, and BulkMerge.
Support: SQL Server, SQL Azure, SQL Compact, Oracle, MySQL, SQLite, and PostgreSQL.
This library is NOT free. FREE Trial always available for the current month.